WO1985004975A1 - Resonant tag and deactivator for use in an electronic security system - Google Patents
Resonant tag and deactivator for use in an electronic security system Download PDFInfo
- Publication number
- WO1985004975A1 WO1985004975A1 PCT/US1984/000613 US8400613W WO8504975A1 WO 1985004975 A1 WO1985004975 A1 WO 1985004975A1 US 8400613 W US8400613 W US 8400613W WO 8504975 A1 WO8504975 A1 WO 8504975A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resonant
- frequency
- substrate
- conductive areas
- circuit
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
- G08B13/242—Tag deactivation
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2428—Tag details
- G08B13/2431—Tag circuit details
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2428—Tag details
- G08B13/2437—Tag layered structure, processes for making layered tags
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2428—Tag details
- G08B13/2437—Tag layered structure, processes for making layered tags
- G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2519/00—Labels, badges
- B32B2519/02—RFID tags
Definitions
- This invention relates to electronic security systems for the detection of a resonant tag circuit in a controlled area, and more particularly to a tag circuit and apparatus for the electronic deactivation of the tag circuit.
- Electronic security systems are known for detecting the unauthorized removal of articles from an area under detection. Such systems have been employed especially for use in retail stores to prevent the theft of articles from the store, and in libraries to prevent the theft of books.
- Such electronic security systems generally include an electromagnetic field which is provided in a controlled area through which articles must pass in leaving the protected premises.
- a resonant tag circuit is attached to the items, and the presence of the tag circuit in the controlled area is sensed by a receiving system to denote the unauthorized removal of the article.
- the tag circuit is removed by authorized personnel from an article properly leaving the premises to permit passage of the article through the controlled area without alarm activation.
- the fusible link must be extremely small and made of a material to allow fusing at low power levels.
- the small fusible link has a high resistance which appears in series with the inductor of the resonant circuit. The series resistance reduces the Q of the resonant circuit and thus reduces the sensitivity of the circuit to be detected.
- the current level at which the fusible link melts is determined by the geometry of the link as well as the heat conduction properties of the materials surrounding the fusible link. Thus, the fusing current is greatly affected by the material which cover and support the fusible link.
- the resonant circuit can have a resonant frequency which will vary within a range due to manufacturing tolerances.
- the deactivation frequency is at a fixed frequency, and thus the resonant circuit may not be tuned exactly to the fixed deactivation frequency.
- the series impedance of the inductor and capacitor at the intended deactivation frequency must be as small as possible in order to permit the maximum current to flow through the fusible link to cause burnout of the link. Therefore, the capacitor should have a value as large as possible, and the inductor, a value as small as possible.
- the inductor is formed as a single turn, and the capacitor is formed of plates as large as possible consistent with the economic and physical limitations of the particular tag circuit. The size of the capacitor increases the cost and size of the overall resonant circuit.
- the present invention provides a resonant tag circuit having at least one resonant frequency and operative in an electronic security system in which the tag circuit is sensed and electronically deactivated to destroy or alter the resonant characteristics of the tag circuit at the detection frequency.
- the resonant tag circuit is electronically deactivated by a breakdown mechanism operative within the resonant structure of the tag without need for a fusible link and without affect or reduction in the Q of the resonant circuit.
- the resonant tag circuit is of planar form having a flat spiral formed on a surface of a thin plastic substrate film and at least one capacitor formed by capacitor plates on respective opposite surfaces of the substrate. Energy is coupled to the tag circuit at or near the resonant frequency to cause electrical breakdown through the substrate film between the capacitor plates.
- the resonant structure includes means to insure that breakdown will almost always occur in a predetermined region between the capacitor plates.
- an electric arc is formed through the substrate film to cause vaporization of a surrounding or adjacent conductive area to thereby destroy the resonant properties of the circuit.
- the electrical breakdown through the substrate film can cause formation of a plasma and deposition of metal between the capacitor plates along the discharge path, thereby to form a permanent short circuit between the capacitor plates which destroys the resonant properties of the circuit.
- Fig.1 is a schematic diagram of a resonant tag circuit embodying the invention
- Fig. 2 is a schematic diagram of a dual frequency resonant tag circuit embodying the invention
- Fig.3 and 4 are pictorial views of respective sides of the resonant tag circuit of Fig.1;
- Figs.5 and 6 are pictorial views of respective sides of the resonant tag circuit of Fig. 2;
- Fig. 7 is a block diagram of an electronic security system employing the invention.
- Fig. 8 is a schematic diagram of an alternative embodiment of a single frequency resonant tag circuit
- Fig. 9 is a schematic diagram of an alternative embodiment of a dual frequency resonant tag circuit
- Figs.10, 11, and 12 are diagrammatic representations of the electrical breakdown mechanism employed in the invention
- Fig. 13 is a schematic diagram of electronic apparatus for determining the resonant frequency of a tag circuit to be deactivated
- Figs. 14 and 15 are waveforms useful in illustrating the operation of the apparatus of Fig. 13;
- Fig. 16 is a block diagram of an electronic deactivator providing deactivation energy for a controlled interval.
- a resonant tag circuit which includes a capacitor C1 formed of capacitor plates 10 and 12 on respective opposite surfaces of a substrate 14 which is of a dielectric or electrically insulative material, and an inductor L1 in series with the capacitor to provide a single resonant frequency.
- the inductor is connected at one end to capacitor plate 10, and has the other end connected to an electrical path 16 through the substrate 14 which is connected to the capacitor plate 12 via a conductive path 18.
- the inductor and capacitor plate 10 are integrally formed on one surface of the substrate.
- the inductor is formed as a flat, rectangular spiral on the substrate surface.
- the capacitor plate 12 and associated connecting path are integrally formed on the opposite substrate surface.
- a portion 20 of the conductive path 18 which confronts the capacitor plate 10 is indented or otherwise formed to be spaced from the capacitor plate 10 by a distance which is less than the distance between the plates 10 and 12.
- the voltage across the capacitor plates 10 and 12 increases until electrical breakdown occurs at the burnout point provided by the idented portion 20 of the conductive path. Since this portion provides the shortest distance between the capacitor plates, electrical breakdown always occurs at this point.
- the electric arc formed at breakdown is sustained by the energy which is being continuously coupled to the resonant circuit by an external power source. The electric arc vaporizes metal in the vicinity of the breakdown region 20 which destroys the conductive path 18, thereby permanently destroying the resonant characteristics of the tag circuit.
- FIG. 2 An alternative embodiment of the resonant tag circuit is illustrated schematically in Fig. 2 in which the tag circuit exhibits two resonant frequencies.
- the circuit of Fig. 2 includes a second capacitor C2 formed by plates 22 and 24 and an inductor L2.
- the junction of the inductors L1 and L2 is connected to the capacitor plate 22.
- the other end of inductor L2 is connected to a through connection 26 in the substrate and which is connected through a conductive path 28 to the capacitor plate 24.
- a conductive path 30 interccnnects the capacitor plates 24 and 12, and this conductive path includes an indented burnout portion 32 provided in conflicting relation to the capacitor plate 22.
- One resonant frequency is employed for detection of the tag by an associated electronic security system, and the other resonant frequency is employed for deactivation of the tag.
- the deactivation frequency is selected to be one of the frequencies allocated by the Federal Communications Commission (FCC) to be in the industrial, scientific and medical (ISM) band so that the radiated energy for tag deactivation can be at relatively high power without special federal license.
- the detection frequency is usually chosen to be in one of the frequency bands allocated for field disturbance sensors. A detection frequency of 8.2 MHz is typical.
- the capacitor C2 and inductor L2 are the primary components which form a resonant tuned circuit at the deactivation frequency, while the inductor L1 in conjunction with the capacitor C1 are the primary components which form a resonant tuned circuit at the detection frequency. Due to mutual coupling, all the components interact to provide the exact detection and deactivation frequencies. When sufficient energy is coupled to the circuit at the deactivation frequency, the voltage increases across the capacitor plates 22 and 24 until the substrate film breaks down at the burnout point 32. Again, breakdown always occurs at the burnout point, since this point or region 32 provides the shortest distance between the capacitor plates 22 and 24.
- the electric arc provided upon breakdown is sustained by the energy being coupled to the resonant circuit from the external power source and this arc causes vaporization of metal in the vicinity of the breakdown region, including the adjacent portion of conductive path 30.
- the electric arc is extinguished.
- the resonant properties of the tag at the detection frequency are permanently destroyed since there is no longer an electrical connection between capacitor plate 24 and capacitor plate 12.
- the resonant circuits of Figs. 1 and 2 do not require the use of a small narrow fuse and there is thus no additional resistance placed in series with the inductor and capacitor elements of the circuit. There is, therefore, no degradation of the Q of the resonant circuit. Moreover, since the electric arc occurs between the capacitor plates and not on the surface, the materials, which cover or are in contact with the surface of the capacitor plates do not significantly affect the ability of the electric arc to vaporize the metal in the vicinity of the arc. In order to maximize the voltage developed across the capacitor plates 22 and 24, the capacitance of capacitor C2 should be as small as possible and the inductance of inductor L2 should be as large as possible to provide resonance at the intended deactivation frequency. The capacitor C2 can be made quite small physically and will not significantly increase the overall size and cost of the dual frequency tag circuit of Fig. 2.
- the resonant tag circuit of Fig. 1 is illustrated in typical construction in Figs. 3 and 4 which respectively depict the opposite planar surfaces of the tag.
- the inductor L1 is formed as a flat spiral 40 on the surface of the thin plastic film substrate 42.
- the plastic film serves as the dielectric of the parallel plate capacitor as well as the supporting substrate for the circuit.
- the spiral path extends between an outer conductive area 44 and an inner conductive area 46.
- the inner conductive area 46 serves as capacitor plate 10.
- cenductive areas 48 and 50 are in alignment with the respective conductive areas 44 and 46, and are interconnected by a conductive path 52.
- the ccnetactive area 50 serves as the capacitor plate 12 and thus capacitor C1 is provided by the confronting conductive areas 46 and 50.
- a conductive interconnection 54 couples conductive areas 44 and 48 together to complete the circuit.
- the conductive area 50 includes recesses 51 adjacent to the area of joinder between the conductive area 50 and the conductive path 52.
- This area includes an indented portion 56 to provide a conductive area of the path 52 which confronts the conductive area 46 and which is more closely spaced thereto than the spacing between the conductive areas 46 and 50.
- This indentation 56 provides the burnout point at which electrical breakdown will occur in response to the application of energy from an external source at the resonant frequency of the tag circuit and of sufficient power to cause breakdown.
- the dual frequency tag circuit of Fig. 2 is shewn in typical construction in Figs. 5 and 6 which depict the respective opposite planar surfaces of the tag.
- the inductor L1 is formed by a flat spiral 60 on the surface of the plastic film 62, this spiral extending between conductive areas 64 and 66.
- the conductor L2 is formed by a flat spiral 68 on the film surface and which extends between conductive area 64 and conductive area 70.
- conductive areas 72, 74, and 76 are provided in alignment with the respective conductive areas 64, 66 and 70 on the other substrate surface.
- the conductive areas 72 and 74 are interconnected by a conductive path 78, while the conductive areas 72 and 76 are connected by a conductive path 80.
- a burnout point is provided in the conductive path 78 by indentation of a portion 82 of the path confronting the conductive area 64.
- the capacitor C1 of Fig. 2 is provided by the conductive areas 66 and 74, while the capacitor C2 is provided by the conductive areas 64 and 72.
- a conductive interconnection 84 between the conductive areas 70 and 76 is provided through the substrate film to complete the circuit. The circuit is operative in the manner described to cause destruction of the resonant properties of the tag circuit at the detection frequency by burnout or vaporization of the conductive path near the burnout point 82 in response to an electric arc.
- the resonant tags described herein are similar to those of patent 3,810,147 of the inventor hereof. Construction of the tag circuits is preferably according to the planar circuit fabrication process which is the subject of patent 3,913,219 of the inventor hereof.
- FIG. 7 Apparatus is shown in Fig. 7 for use in deactivating the resonant properties of the tag circuits described above.
- This apparatus includes an antenna 90 operative to sense the presence of a resonant tag circuit 92 and coupled to a tag sensing system 94 which provides an output signal to a tag presence indicator 96 and a tag deactivation indicatcr 98.
- the tag sensing system 94 also provides a control signal to a tag deactivation system 100 which includes an antenna 102.
- the tag deactivation system can also be manually activated by manual control 104.
- the tag sensing system 94 Upon sensing the presence of the tag circuit 92, the tag sensing system 94 is operative to trigger the deactivation system 100 to cause radiation by antenna 102 of radiation at the resonant frequency of the tag circuit and of sufficient power level to cause electrical breakdown at the breakdown point of the tag circuit and formation of an electric arc.
- the deactivation system provides energy at the deactivation frequency of that tag. Visual or other indications can be provided by indicators 96 and 98 of the presence and deactivation of the tag.
- a tag circuit is a single resonant circuit as shown in Fig. 1, the tag sensing system 94 is operative to determine the resonant frequency of the particular tag 92 which is sensed, and to provide a control signal to the deactivation system 100 representative of the measured resonant tag frequency. In response to the control signal, the deactivation system will provide radiation at this resonant frequency, and efficient coupling to the tag circuit for destruction of its resonant properties.
- the tag sensing system 94 can include the apparatus shown in Fig. 13 to determine the approximate resonant frequency of the tag circuit.
- a voltage controlled oscillator 150 drives the tag sensing antenna 90, the oscillator being controlled by the output of a microcomputer 152 by way of a digital-to-analog converter 154.
- the microcomputer stores digital values which after conversion to analog form by converter 154, drive oscillator 150 to produce a stepwise frequency sweep.
- the antenna signal is applied to an analog-to-digital converter 156, the digital output of which is applied to the microcomputer 152 which stores such digital outputs.
- Fig. 14 The output of the voltage controlled oscillator 150 is shown in Fig. 14 and comprises frequency steps, each step occurring for a corresponding time interval or step number.
- Fig. 15 illustrates the current through the antenna 90 in relation to time. With no resonant circuit present, the current through the antenna decreases as the frequency of the oscillator increases, as illustrated by the straight line portion of the waveform of Fig. 15. With a resonant circuit 92 present near the antenna 90, the impedance of the resonant circuit will be reflected into the antenna and cause an abrupt reduction in antenna current as illustrated in Fig. 15.
- the current through the antenna is converted to digital values by converter 156, and these digital values are stored in the memory of microcomputer 152.
- the step number which corresponds to the minimum value of the stored current values corresponds to the approximate resonant frequency of the tag circuit.
- the stored digital value representing the resonant frequency is converted to an analog signal for control of oscillator 150 to provide an output at the resonant frequency for actuation of deactivation system 100 (Fig. 7) for destruction of the resonant properties of the tag circuit 92.
- the deactivation energy is applied for a predetermined period of time determined in accordance with the time intended for tag deactivation.
- the tag sensing system 94 is operative to sense tag presence, and if the tag has been deactivated, the indicator 98 will be energized to denote that deactivation has occurred. If the tag 92 is still operative at its resonant frequency as sensed by system 94, the deactivation system 100 will again be triggered for another deactivation cycle. The deactivation cycle will be repeated a determined number of times until deactivation occurs. If deactivation has not occurred after a predetermined number of cycles, an annunciator can be enabled to denote to the operator that the particular tag has not been deactivated. The operator can then manually actuate the deactivation system for deactivation of the tag or take other action to deactivate or destroy the tag.
- the tag sensing system 94 upon detection of a resonant tag circuit 92, can cause the deactivation system 100 to drive antenna 102 with a relatively high power signal that is slowly swept in frequency through the resonant frequency of the tag 92.
- the apparatus can be operative to alternately sense tag presence and activate the deactivation field in a cyclic manner until the tag is deactivated. Again, an operator can be notified by appropriate annunication in the event that a particular tag has not been deactivated.
- the tag sensing system 94 is operative to detect the resonant detection frequency of the tag, while the deactivation system 100 is operative to provide energy at the resonant deactivation frequency of the tag.
- Resonant circuits of alternative construction are shewn in Figs. 8 and 9 and which will be recognized as being similar to the respective circuits of Figs. 1 and 2.
- an indentation is made at any selected point or multiple points on one or both of the capacitor plates to reduce the thickness of the dielectric film at this indentation, and thereby reduce the voltage required to cause an arc across the capacitor plates.
- the indentation is shown in the capacitor plate 12a.
- the indentation is shown in the capacitor plate 24a.
- a short circuit is formed, the tag is permanently destroyed. If a short circuit is not formed, the voltage again builds up across the capacitor plates in response to the applied energy, and the process is repeated. Since the plastic film has already been ruptured and weakened at the breakdown point, the arc will normally form again at the same point, and additional metal will be vaporized and deposited until a permanent short circuit occurs.
- the deactivation sequence is illustrated in Figs. 10-12. In Fig. 10 there is shown the commencement of a voltage breakdown through the plastic film 110 and between the plates 112 and 114. Formation of the plasma after arc discharge is shown in Fig. 11, and the final deposition of metal along the discharge path to short circuit the capacitor plates is depicted in Fig. 12.
- the deactivation power should be accurately controlled, or the deactivation process electronically monitored to turn off the deactivator shortly after the first arc has formed.
- the deactivator can be re-energized on a cyclic basis as described until a permanent short circuit has developed across the capacitor plates. Since the deactivator antenna is coupled to the tag circuit, the impedance of the tag circuit is reflected back into the deactivation antenna.
- the impedance of the resonant circuit abruptly changes, and this change is reflected directly back into the deactivation antenna and can be detected by the deactivation systemand employed for accurate control of the deactivation system.
- the deactivation system can be turned off and cyclically reapplied to cause arc formation and deposition of metal along the discharge path between the capacitor plates to provide in a controlled manner deactivation of the resonant properties of the tag circuit.
- the deactivation system 100 can be controlled in the manner illustrated in Fig. 16.
- the tag sensing system 94 provides a tag signal in response to the swept radio frequency signal passing through the resonant frequency of the tag circuit, and this tag signal is applied to a sharp cutoff high pass filter 160.
- the filter 160 filters out the modulation components and substantially all components of the tag signal spectrum.
- a threshold detector 162 which triggers a timer 164 which determines the time interval during which the tag deactivation system 100 operates.
- the operating cycle may be repeated as necessary to deactivate the resonant properties of the tag circuit.
- the invention is not to be limited by what has been particularly shown and described except as indicated in the appended claims.
Abstract
Description
Claims
Priority Applications (29)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/376,777 US4498076A (en) | 1982-05-10 | 1982-05-10 | Resonant tag and deactivator for use in an electronic security system |
CH1586A CH669858C2 (en) | 1982-05-10 | 1984-04-23 | |
JP59502086A JPS61501947A (en) | 1984-04-23 | 1984-04-23 | Electronically detectable and deactivable signs and electronic safety devices using such signs |
EP84901894A EP0181327B2 (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for use in an electronic security system |
GB08531530A GB2173073B (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for use in an electronic security system |
CH387288A CH673722C1 (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for elrctronic security system |
PCT/US1984/000613 WO1985004975A1 (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for use in an electronic security system |
NL8420106A NL193507C (en) | 1982-05-10 | 1984-04-23 | Electronically detectable and deactivatable label circuit for use in an electronic surveillance system. |
AU28233/84A AU584306B2 (en) | 1984-04-23 | 1984-04-23 | Electronically detectable and deactivatable security tag |
DE3490695A DE3490695C2 (en) | 1984-04-23 | 1984-04-23 | Resonant tag and deactivator for electronic security system |
MC84US8400613D MC1736A1 (en) | 1984-04-23 | 1984-04-23 | RESONANT LABEL AND DEACTIVATOR FOR USE IN AN ELECTRONIC SECURITY SYSTEM |
BR8407314A BR8407314A (en) | 1984-04-23 | 1984-04-23 | RESONANT CIRCUIT OF THE LABEL AND DISABLING TYPE FOR USE IN AN ELECTRONIC SAFETY SYSTEM |
NZ208526A NZ208526A (en) | 1984-04-23 | 1984-06-15 | Deactivation of security system resonant tag |
IE1502/84A IE56656B1 (en) | 1984-04-23 | 1984-06-15 | Resonant tag and deactivator for use in an electronic security system |
IL72143A IL72143A (en) | 1984-04-23 | 1984-06-18 | Electromagnetic resonant tag for use in electronic theft-preventing systems |
ZA844812A ZA844812B (en) | 1984-04-23 | 1984-06-25 | Resonant tag and deactivator for use in an electronic security system |
DD84264586A DD220467A5 (en) | 1984-04-23 | 1984-06-27 | CONTACT PEN RESONANT CIRCUIT |
BG66217A BG49388A3 (en) | 1984-04-23 | 1984-07-12 | Rosonance edge and a deactivator for electronic security system |
PT78908A PT78908B (en) | 1984-04-23 | 1984-07-13 | Resonant tag circuit and deactvador for use in an electronic security system |
YU131484A YU46285B (en) | 1984-04-23 | 1984-07-24 | ELECTRONIC PENDANT WHEEL |
PL1984248965A PL150494B1 (en) | 1984-04-23 | 1984-07-27 | ELECTRONIC PROTECTION SYSTEM |
PH31047A PH20841A (en) | 1984-04-23 | 1984-07-30 | Resonant tag and deactivator for use in an electronic security system |
ES535180A ES8702686A1 (en) | 1984-04-23 | 1984-08-14 | Resonant tag and deactivator for electronic security system |
TR5754/84A TR23006A (en) | 1984-04-23 | 1984-08-29 | UEC CIRCUIT AND DEACTIVATOER FOR USE IN AN ELECTRONIC SAFETY SYSTEM |
US06/673,265 US4567473A (en) | 1982-05-10 | 1984-11-20 | Resonant tag and deactivator for use in an electronic security system |
SE8505999A SE460809B (en) | 1982-05-10 | 1985-12-18 | RESONANT LABEL CIRCUIT INCLUDING MONEY TO ENSURE ITS RESONANT PROPERTIES AND SECURITY SYSTEM PROVIDED FOR SUCH LABEL CIRCUIT |
DK595785A DK165914C (en) | 1984-04-23 | 1985-12-20 | ELECTRONIC DETECTABLE AND DISABLABLE LABEL AND ELECTRONIC SECURITY SYSTEM WITH SUCH LABEL |
FI855116A FI84668C (en) | 1984-04-23 | 1985-12-20 | RESONANT ETIKETTKRETS OCH ELEKTRONISKT SAEKERHETSSYSTEM FOER DESS ANVAENDNING. |
NO85855242A NO169411C (en) | 1984-04-23 | 1985-12-23 | MARK CIRCUIT FOR USE IN AN ELECTRONIC SECURITY SYSTEM, AND SUCH A SECURITY SYSTEM FOR DISPLAYING THE CIRCUIT CIRCUIT. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/376,777 US4498076A (en) | 1982-05-10 | 1982-05-10 | Resonant tag and deactivator for use in an electronic security system |
PCT/US1984/000613 WO1985004975A1 (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for use in an electronic security system |
US06/673,265 US4567473A (en) | 1982-05-10 | 1984-11-20 | Resonant tag and deactivator for use in an electronic security system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1985004975A1 true WO1985004975A1 (en) | 1985-11-07 |
Family
ID=27374678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1984/000613 WO1985004975A1 (en) | 1982-05-10 | 1984-04-23 | Resonant tag and deactivator for use in an electronic security system |
Country Status (7)
Country | Link |
---|---|
US (2) | US4498076A (en) |
EP (1) | EP0181327B2 (en) |
CH (1) | CH669858C2 (en) |
GB (1) | GB2173073B (en) |
NL (1) | NL193507C (en) |
SE (1) | SE460809B (en) |
WO (1) | WO1985004975A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2191368A (en) * | 1983-12-29 | 1987-12-09 | Revlon | Item indentification transponder tag |
EP0287905A1 (en) * | 1987-04-23 | 1988-10-26 | Actron Entwicklungs AG | Method for deactivating a resonant target, and circuit for carrying out this method |
US4862160A (en) * | 1983-12-29 | 1989-08-29 | Revlon, Inc. | Item identification tag for rapid inventory data acquisition system |
EP0340670A2 (en) * | 1988-04-30 | 1989-11-08 | Tokai Metals Co., Ltd. | Resonant frequency characteristic tag and method of manufacturing the same |
EP0407562A1 (en) * | 1989-01-31 | 1991-01-16 | George F. Andrews | Electronic article surveillance device with remote deactivation |
FR2651354A1 (en) * | 1989-08-23 | 1991-03-01 | Monarch Marking Systems Inc | LABEL FOR THE ELECTRONIC MONITORING OF ARTICLES AND METHOD OF MANUFACTURING SUCH LABELS WITH AN IMPROVED DEVICE TO MAKE THEM INOPERATIVE. |
WO1991009387A1 (en) * | 1989-12-20 | 1991-06-27 | Actron Entwicklungs Ag | Deactivatable resonance label |
EP0454021A1 (en) * | 1990-04-25 | 1991-10-30 | Actron Entwicklungs AG | Method for deactivating a resonant tag and circuit for carrying out this method |
FR2666433A1 (en) * | 1990-09-04 | 1992-03-06 | Monarch Marking Systems Inc | DISABLED LABEL FOR ELECTRONIC MONITORING OF ARTICLES, STRIP OF SUCH LABELS AND METHOD FOR MANUFACTURING SUCH STRIP OF LABELS. |
US5257010A (en) * | 1990-04-25 | 1993-10-26 | Actron Entwicklungs | Process for the deactivation of a reasonance label and circuit arrangement for the execution of the process |
Families Citing this family (139)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3508369A1 (en) * | 1985-03-08 | 1986-09-11 | Max-E. Dipl.-Ing. 7336 Uhingen Reeb | LABEL-LIKE IMAGE AND METHOD FOR THE PRODUCTION THEREOF |
US4689636A (en) * | 1985-03-15 | 1987-08-25 | Minnesota Mining And Manufacturing Company | Deactivatable resonant marker for use in RF electronic article surveillance system |
US4728938A (en) * | 1986-01-10 | 1988-03-01 | Checkpoint Systems, Inc. | Security tag deactivation system |
US4736207A (en) * | 1986-01-31 | 1988-04-05 | Sensormatic Electronics Corporation | Tag device and method for electronic article surveillance |
US4717438A (en) * | 1986-09-29 | 1988-01-05 | Monarch Marking Systems, Inc. | Method of making tags |
CA1294117C (en) * | 1986-09-29 | 1992-01-14 | S. Eugene Benge | Method of making deactivatable tags |
US4954814A (en) * | 1986-09-29 | 1990-09-04 | Monarch Marking Systems, Inc. | Tag and method of making same |
GB2234885B (en) * | 1986-09-29 | 1991-05-22 | Monarch Marking Systems Inc | Tags for use in electronic article surveillance systems and methods of making them |
US4802944A (en) * | 1986-09-29 | 1989-02-07 | Monarch Marking Systems, Inc. | Method of making deactivatable tags |
US4778552A (en) * | 1986-09-29 | 1988-10-18 | Monarch Marking Systems, Inc. | Alarm tag and method of making and deactivating it |
US4846922A (en) * | 1986-09-29 | 1989-07-11 | Monarch Marking Systems, Inc. | Method of making deactivatable tags |
US4779077A (en) * | 1987-04-13 | 1988-10-18 | Lichtblau G J | Continuously armed high reliability pulse train processor |
JPH01129396A (en) * | 1987-11-14 | 1989-05-22 | Tokai Kinzoku Kk | Resonance tag and production |
US4835524A (en) * | 1987-12-17 | 1989-05-30 | Checkpoint System, Inc. | Deactivatable security tag |
GB8822932D0 (en) * | 1988-09-30 | 1988-11-09 | Scient Generics Ltd | System for verification of de-activation of anti-theft markers |
US5059951A (en) * | 1988-11-14 | 1991-10-22 | Checkpoint Systems, Inc. | Method and apparatus for integrated data capture and electronic article surveillance |
JP2533800B2 (en) * | 1989-06-02 | 1996-09-11 | 山武ハネウエル株式会社 | Microwave response device |
ES2194951T3 (en) | 1989-10-31 | 2003-12-01 | Checkpoint Systems Inc | LABELS OR USEFUL SEALS IN RELATION TO AN ELECTRONIC SYSTEM OF ARTICLE SURVEILLANCE. |
US5012225A (en) * | 1989-12-15 | 1991-04-30 | Checkpoint Systems, Inc. | System for deactivating a field-sensitive tag or label |
US5027106A (en) * | 1989-12-27 | 1991-06-25 | Checkpoint Systems, Inc. | Method and apparatus for electronic article surveillance |
NL9000186A (en) * | 1990-01-25 | 1991-08-16 | Nedap Nv | DEACTIVATOR. |
US5025246A (en) * | 1990-04-10 | 1991-06-18 | Sensormatic Electronics Corporation | EAS tag with motion detection facility |
US5103210A (en) * | 1990-06-27 | 1992-04-07 | Checkpoint Systems, Inc. | Activatable/deactivatable security tag for use with an electronic security system |
US5589251A (en) * | 1990-08-06 | 1996-12-31 | Tokai Electronics Co., Ltd. | Resonant tag and method of manufacturing the same |
US5447779A (en) * | 1990-08-06 | 1995-09-05 | Tokai Electronics Co., Ltd. | Resonant tag and method of manufacturing the same |
US5695860A (en) * | 1990-08-06 | 1997-12-09 | Tokai Electronics Co., Ltd. | Resonant tag and method of manufacturing the same |
US5081446A (en) * | 1990-09-24 | 1992-01-14 | Checkpoint Systems, Inc. | Security tag for compact disc storage container |
NL9002120A (en) * | 1990-09-28 | 1992-04-16 | Nedap Nv | PULSE DEACTIVATOR. |
FR2669756A1 (en) * | 1990-11-23 | 1992-05-29 | Cga Hbs | System for recording and invalidating the identification of a product |
US5081445A (en) * | 1991-03-22 | 1992-01-14 | Checkpoint Systems, Inc. | Method for tagging articles used in conjunction with an electronic article surveillance system, and tags or labels useful in connection therewith |
US5241299A (en) * | 1991-05-22 | 1993-08-31 | Checkpoint Systems, Inc. | Stabilized resonant tag circuit |
US5142270A (en) * | 1991-05-22 | 1992-08-25 | Checkpoint Systems Inc. | Stabilized resonant tag circuit and deactivator |
GB9114793D0 (en) * | 1991-07-09 | 1991-08-28 | Scient Generics Ltd | Novel rf tag |
US5142292A (en) * | 1991-08-05 | 1992-08-25 | Checkpoint Systems, Inc. | Coplanar multiple loop antenna for electronic article surveillance systems |
US5218189A (en) * | 1991-09-09 | 1993-06-08 | Checkpoint Systems, Inc. | Binary encoded multiple frequency rf indentification tag |
US5182544A (en) * | 1991-10-23 | 1993-01-26 | Checkpoint Systems, Inc. | Security tag with electrostatic protection |
BR9206945A (en) * | 1991-12-19 | 1995-11-28 | Ake Gustafson | Hermetic safety closing device |
US5341125A (en) * | 1992-01-15 | 1994-08-23 | Sensormatic Electronics Corporation | Deactivating device for deactivating EAS dual status magnetic tags |
US5276431A (en) * | 1992-04-29 | 1994-01-04 | Checkpoint Systems, Inc. | Security tag for use with article having inherent capacitance |
US5442334A (en) * | 1992-07-20 | 1995-08-15 | Stoplift Corporation | Security system having deactivatable security tag |
NL9202067A (en) * | 1992-11-27 | 1994-06-16 | Dutch A & A Trading Bv | Detection label. |
DE4244272A1 (en) * | 1992-12-28 | 1994-06-30 | Daimler Benz Ag | Field effect controlled semiconductor device |
ATE176345T1 (en) * | 1993-04-14 | 1999-02-15 | Ake Gustafson | ELECTRONIC MARKING DEVICE |
AU8073194A (en) * | 1993-10-05 | 1995-05-01 | Pac/Scan, Inc. | Retail theft prevention and information device |
US5510770A (en) * | 1994-03-30 | 1996-04-23 | Checkpoint Systems, Inc. | Surface deactivateable tag |
NL9400810A (en) * | 1994-05-18 | 1996-01-02 | Nedap Nv | Deactivation and coding system for a contactless anti-theft or identification label. |
US5923001A (en) * | 1994-08-05 | 1999-07-13 | Surgical Resources, L.L.C. | Automatic surgical sponge counter and blood loss determination system |
US5650596A (en) * | 1994-08-05 | 1997-07-22 | Surgical Resources, L.L.C. | Automatic surgical sponge counter and blood loss determination system |
US6998541B2 (en) | 1994-08-05 | 2006-02-14 | Clearcount Medical Solutions, Inc. | Automatic surgical sponge counter and blood loss determination system |
CA2156205A1 (en) | 1994-08-25 | 1996-02-26 | Nobuyuki Nakatou | Resonant sensor |
US5517195A (en) * | 1994-09-14 | 1996-05-14 | Sensormatic Electronics Corporation | Dual frequency EAS tag with deactivation coil |
US5541399A (en) * | 1994-09-30 | 1996-07-30 | Palomar Technologies Corporation | RF transponder with resonant crossover antenna coil |
DE4435815A1 (en) * | 1994-10-07 | 1996-04-11 | Esselte Meto Int Gmbh | Label with covering layer carrying information e.g. for stockroom or store |
DE4442510A1 (en) | 1994-11-30 | 1996-06-05 | Esselte Meto Int Gmbh | Label to secure an article against theft |
US5508684A (en) * | 1995-03-02 | 1996-04-16 | Becker; Richard S. | Article tag |
US5798693A (en) * | 1995-06-07 | 1998-08-25 | Engellenner; Thomas J. | Electronic locating systems |
FI100491B (en) * | 1995-08-23 | 1997-12-15 | Tuotesuoja Sirpa Jaervensivu K | Product protection sensor deactivation equipment |
US5574431A (en) * | 1995-08-29 | 1996-11-12 | Checkpoint Systems, Inc. | Deactivateable security tag |
US5754110A (en) * | 1996-03-07 | 1998-05-19 | Checkpoint Systems, Inc. | Security tag and manufacturing method |
NL1002720C2 (en) * | 1996-03-27 | 1997-09-30 | Nedap Nv | Fixed frequency resonance label for theft prevention |
SE510118C2 (en) * | 1996-04-11 | 1999-04-19 | Leif Goesta Aasbrink | Method and apparatus for deactivating alarm elements |
US5781110A (en) * | 1996-05-01 | 1998-07-14 | James River Paper Company, Inc. | Electronic article surveillance tag product and method of manufacturing same |
US6466131B1 (en) * | 1996-07-30 | 2002-10-15 | Micron Technology, Inc. | Radio frequency data communications device with adjustable receiver sensitivity and method |
DE19705722A1 (en) * | 1996-08-06 | 1998-02-19 | Esselte Meto Int Gmbh | Resonant circuit for electronic article surveillance |
ATE191095T1 (en) | 1996-08-06 | 2000-04-15 | Meto International Gmbh | SECURITY ELEMENT FOR ELECTRONIC ARTICLE SECURITY |
ATE191288T1 (en) | 1996-08-06 | 2000-04-15 | Meto International Gmbh | RESONANCE SWING CIRCUIT FOR ELECTRONIC ARTICLE SECURITY |
DE19753619A1 (en) * | 1997-10-29 | 1999-05-06 | Meto International Gmbh | Identification tag with radio frequency identification transponder |
US5841350A (en) * | 1997-06-27 | 1998-11-24 | Checkpoint Systems, Inc. | Electronic security tag useful in electronic article indentification and surveillance system |
US5963134A (en) | 1997-07-24 | 1999-10-05 | Checkpoint Systems, Inc. | Inventory system using articles with RFID tags |
US6025780A (en) * | 1997-07-25 | 2000-02-15 | Checkpoint Systems, Inc. | RFID tags which are virtually activated and/or deactivated and apparatus and methods of using same in an electronic security system |
US5861809A (en) * | 1997-09-22 | 1999-01-19 | Checkpoint Systems, Inc. | Deactivateable resonant circuit |
DE19749213A1 (en) * | 1997-11-07 | 1999-05-12 | Rehder Physik Gmbh | Goods security label which can be switched on and off |
US5852856A (en) * | 1997-11-13 | 1998-12-29 | Seidel; Stuart T. | Anti theft ink tag |
US5973606A (en) * | 1997-12-08 | 1999-10-26 | Sensormatic Electronics Corporation | Activation/deactivation system and method for electronic article surveillance markers for use on a conveyor |
US6091607A (en) * | 1998-12-10 | 2000-07-18 | Checkpoint Systems, Inc. | Resonant tag with a conductive composition closing an electrical circuit |
DE19908877A1 (en) * | 1999-03-01 | 2000-10-12 | Georg Siegel Gmbh Zur Verwertu | Goods security label for LF operation has flat carrier element with defined number of tracks of electrically conducting material applied to one surface parallel to each other to form spiral path |
US6232878B1 (en) | 1999-05-20 | 2001-05-15 | Checkpoint Systems, Inc. | Resonant circuit detection, measurement and deactivation system employing a numerically controlled oscillator |
UA59498C2 (en) * | 1999-12-07 | 2003-09-15 | Інфінеон Текнолоджіс Аг | Goods label, a method for producing the label, and a method for contactless identification of goods |
JP2003512663A (en) * | 1999-12-07 | 2003-04-02 | データマーズ、ソシエテ、アノニム | Repeater operation method |
EP1269412A1 (en) * | 2000-03-28 | 2003-01-02 | Lucatron AG | Rfid label with an element for regulating the resonance frequency |
US6806812B1 (en) * | 2000-04-26 | 2004-10-19 | Micron Technology, Inc. | Automated antenna trim for transmitting and receiving semiconductor devices |
US6404340B1 (en) | 2000-06-19 | 2002-06-11 | Massachusetts Institute Of Technology | Multiple-axis tracking of passive resonant structures |
WO2001099074A2 (en) * | 2000-06-19 | 2001-12-27 | Impac Group, Inc. | Electronic article surveillance tag and method for making same |
US6595421B2 (en) | 2001-01-31 | 2003-07-22 | Ncr Corporation | Integrated antenna scanner window |
CN100334603C (en) * | 2001-05-04 | 2007-08-29 | 微金属技术公司 | Metallized dielectric substrates for EAS tags |
ATE473548T1 (en) * | 2001-05-16 | 2010-07-15 | Nxp Bv | FREQUENCY MODULATOR USING A PHASE CONTROL LOOP |
US6933848B1 (en) * | 2001-05-31 | 2005-08-23 | Alien Technology Corporation | System and method for disabling data on radio frequency identification tags |
US6942155B1 (en) | 2001-05-31 | 2005-09-13 | Alien Technology Corporation | Integrated circuits with persistent data storage |
US7377445B1 (en) | 2001-05-31 | 2008-05-27 | Alien Technology Corporation | Integrated circuits with persistent data storage |
US6946963B2 (en) | 2001-10-16 | 2005-09-20 | Spectra Research, Inc. | Secure storage disc and disc surveillance system |
US7189757B2 (en) * | 2001-10-16 | 2007-03-13 | Hypnion, Inc. | Treatment of sleep disorders using CNS target modulators |
FI113570B (en) * | 2002-04-25 | 2004-05-14 | Rafsec Oy | Procedure for manufacturing a product sensor and product sensor |
US7113131B2 (en) * | 2002-05-02 | 2006-09-26 | Micrometal Technologies, Inc. | Metalized dielectric substrates for EAS tags |
US6919806B2 (en) * | 2002-09-06 | 2005-07-19 | Sensormatic Electronics Corporation | Deactivatable radio frequency security label |
US8174366B2 (en) * | 2003-03-03 | 2012-05-08 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7541933B2 (en) * | 2003-03-03 | 2009-06-02 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7019650B2 (en) * | 2003-03-03 | 2006-03-28 | Caducys, L.L.C. | Interrogator and interrogation system employing the same |
US8542717B2 (en) | 2003-03-03 | 2013-09-24 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8948279B2 (en) | 2004-03-03 | 2015-02-03 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7671744B2 (en) * | 2003-03-03 | 2010-03-02 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8063760B2 (en) * | 2003-03-03 | 2011-11-22 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7764178B2 (en) * | 2003-03-03 | 2010-07-27 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7893840B2 (en) * | 2003-03-03 | 2011-02-22 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US7138919B2 (en) * | 2004-02-23 | 2006-11-21 | Checkpoint Systems, Inc. | Identification marking and method for applying the identification marking to an item |
US7384496B2 (en) * | 2004-02-23 | 2008-06-10 | Checkpoint Systems, Inc. | Security tag system for fabricating a tag including an integrated surface processing system |
US7704346B2 (en) * | 2004-02-23 | 2010-04-27 | Checkpoint Systems, Inc. | Method of fabricating a security tag in an integrated surface processing system |
US7116227B2 (en) * | 2004-02-23 | 2006-10-03 | Checkpoint Systems, Inc. | Tag having patterned circuit elements and a process for making same |
US8099335B2 (en) | 2004-02-23 | 2012-01-17 | Checkpoint Systems, Inc. | Method and system for determining billing information in a tag fabrication process |
US7119685B2 (en) * | 2004-02-23 | 2006-10-10 | Checkpoint Systems, Inc. | Method for aligning capacitor plates in a security tag and a capacitor formed thereby |
US7152804B1 (en) | 2004-03-15 | 2006-12-26 | Kovlo, Inc. | MOS electronic article surveillance, RF and/or RF identification tag/device, and methods for making and using the same |
US20060017545A1 (en) * | 2004-03-26 | 2006-01-26 | Volpi John P | Radio frequency identification interrogation systems and methods of operating the same |
DE102004034768B4 (en) * | 2004-07-19 | 2007-11-15 | Infineon Technologies Ag | Identification media |
US7286053B1 (en) | 2004-07-31 | 2007-10-23 | Kovio, Inc. | Electronic article surveillance (EAS) tag/device with coplanar and/or multiple coil circuits, an EAS tag/device with two or more memory bits, and methods for tuning the resonant frequency of an RLC EAS tag/device |
US7109867B2 (en) * | 2004-09-09 | 2006-09-19 | Avery Dennison Corporation | RFID tags with EAS deactivation ability |
US7501948B2 (en) * | 2004-09-29 | 2009-03-10 | Lone Star Ip Holdings, Lp | Interrogation system employing prior knowledge about an object to discern an identity thereof |
US9953259B2 (en) * | 2004-10-08 | 2018-04-24 | Thin Film Electronics, Asa | RF and/or RF identification tag/device having an integrated interposer, and methods for making and using the same |
EP1807814A1 (en) * | 2004-11-05 | 2007-07-18 | Qinetiq Limited | Detunable rf tags |
WO2007000578A2 (en) | 2005-06-25 | 2007-01-04 | Omni-Id Limited | Electromagnetic radiation decoupler |
US7646305B2 (en) * | 2005-10-25 | 2010-01-12 | Checkpoint Systems, Inc. | Capacitor strap |
US7623040B1 (en) | 2005-11-14 | 2009-11-24 | Checkpoint Systems, Inc. | Smart blister pack |
US7605708B2 (en) | 2005-12-22 | 2009-10-20 | Checkpoint Systems, Inc. | Smart corrugated cardboard |
JP2009529164A (en) | 2006-03-03 | 2009-08-13 | チエツクポイント システムズ, インコーポレーテツド | HARD SECURITY TAG, LOCK SYSTEM, AND STRUCTURE PROTECTION METHOD EQUIPPED WITH RADIO FREQUENCY ELECTRIC RELEASE |
US7646304B2 (en) | 2006-04-10 | 2010-01-12 | Checkpoint Systems, Inc. | Transfer tape strap process |
GB0611983D0 (en) * | 2006-06-16 | 2006-07-26 | Qinetiq Ltd | Electromagnetic radiation decoupler |
WO2008033574A2 (en) * | 2006-09-13 | 2008-03-20 | Clearcount Medical Solutions, Inc. | Apparatus and methods for monitioring objects in a surgical field |
GB0624915D0 (en) * | 2006-12-14 | 2007-01-24 | Qinetiq Ltd | Switchable radiation decoupling |
GB0625342D0 (en) * | 2006-12-20 | 2007-01-24 | Qinetiq Ltd | Radiation decoupling |
MX2009007721A (en) * | 2007-01-18 | 2009-07-30 | Checkpoint Systems Inc | Permanently destructible resonant circuit with non-self-healing capacitor. |
US8138921B1 (en) * | 2007-08-09 | 2012-03-20 | Kovio, Inc. | Reliable tag deactivation |
US7755491B2 (en) * | 2007-08-13 | 2010-07-13 | Veroscan, Inc. | Interrogator and interrogation system employing the same |
US8633821B2 (en) * | 2007-12-03 | 2014-01-21 | Avery Dennison Corporation | Dual use RFID/EAS device |
CN101551873B (en) * | 2008-04-03 | 2013-07-10 | 北京顺特科技有限公司 | Friction type resurrection-resistant radio frequency theftproof label |
WO2010022250A1 (en) | 2008-08-20 | 2010-02-25 | Omni-Id Limited | One and two-part printable em tags |
US9035774B2 (en) | 2011-04-11 | 2015-05-19 | Lone Star Ip Holdings, Lp | Interrogator and system employing the same |
US10453055B2 (en) | 2012-02-12 | 2019-10-22 | Cytherean Mandelbrot LLC | Method for secure electronic tender |
US8912890B2 (en) | 2012-10-01 | 2014-12-16 | Thin Film Electronics Asa | Surveillance devices with multiple capacitors |
EP2759975B1 (en) * | 2013-01-24 | 2017-06-07 | Nxp B.V. | Tag system, sellable item and method for facilitating the purchase of a sellable item |
JP5831487B2 (en) * | 2013-03-29 | 2015-12-09 | ソニー株式会社 | Non-contact communication antenna, communication device, and method of manufacturing non-contact communication antenna |
US9870686B2 (en) | 2015-12-28 | 2018-01-16 | Checkpoint Systems, Inc. | Radio frequency label for packaging security |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3624631A (en) * | 1970-04-27 | 1971-11-30 | Sanders Associates Inc | Pilferage control system |
US3810147A (en) * | 1971-12-30 | 1974-05-07 | G Lichtblau | Electronic security system |
US3913219A (en) * | 1974-05-24 | 1975-10-21 | Lichtblau G J | Planar circuit fabrication process |
US3938044A (en) * | 1973-11-14 | 1976-02-10 | Lichtblau G J | Antenna apparatus for an electronic security system |
US3967161A (en) * | 1972-06-14 | 1976-06-29 | Lichtblau G J | A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3740742A (en) * | 1971-05-11 | 1973-06-19 | T Thompson | Method and apparatus for actuating an electric circuit |
US3774205A (en) * | 1971-08-02 | 1973-11-20 | Ncr Co | Merchandise mark sensing system |
-
1982
- 1982-05-10 US US06/376,777 patent/US4498076A/en not_active Expired - Lifetime
-
1984
- 1984-04-23 EP EP84901894A patent/EP0181327B2/en not_active Expired - Lifetime
- 1984-04-23 GB GB08531530A patent/GB2173073B/en not_active Expired
- 1984-04-23 NL NL8420106A patent/NL193507C/en not_active IP Right Cessation
- 1984-04-23 CH CH1586A patent/CH669858C2/fr not_active IP Right Cessation
- 1984-04-23 WO PCT/US1984/000613 patent/WO1985004975A1/en active IP Right Grant
- 1984-11-20 US US06/673,265 patent/US4567473A/en not_active Expired - Lifetime
-
1985
- 1985-12-18 SE SE8505999A patent/SE460809B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3624631A (en) * | 1970-04-27 | 1971-11-30 | Sanders Associates Inc | Pilferage control system |
US3810147A (en) * | 1971-12-30 | 1974-05-07 | G Lichtblau | Electronic security system |
US3967161A (en) * | 1972-06-14 | 1976-06-29 | Lichtblau G J | A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination |
US3938044A (en) * | 1973-11-14 | 1976-02-10 | Lichtblau G J | Antenna apparatus for an electronic security system |
US3913219A (en) * | 1974-05-24 | 1975-10-21 | Lichtblau G J | Planar circuit fabrication process |
Non-Patent Citations (1)
Title |
---|
See also references of EP0181327A4 * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2191368A (en) * | 1983-12-29 | 1987-12-09 | Revlon | Item indentification transponder tag |
US4862160A (en) * | 1983-12-29 | 1989-08-29 | Revlon, Inc. | Item identification tag for rapid inventory data acquisition system |
EP0287905A1 (en) * | 1987-04-23 | 1988-10-26 | Actron Entwicklungs AG | Method for deactivating a resonant target, and circuit for carrying out this method |
EP0340670A2 (en) * | 1988-04-30 | 1989-11-08 | Tokai Metals Co., Ltd. | Resonant frequency characteristic tag and method of manufacturing the same |
EP0340670A3 (en) * | 1988-04-30 | 1991-04-17 | Tokai Metals Co., Ltd. | Resonant frequency characteristic tag and method of manufacturing the same |
EP0407562A1 (en) * | 1989-01-31 | 1991-01-16 | George F. Andrews | Electronic article surveillance device with remote deactivation |
EP0407562A4 (en) * | 1989-01-31 | 1992-11-19 | Interamerican Industrial Company | Electronic article surveillance device with remote deactivation |
FR2651354A1 (en) * | 1989-08-23 | 1991-03-01 | Monarch Marking Systems Inc | LABEL FOR THE ELECTRONIC MONITORING OF ARTICLES AND METHOD OF MANUFACTURING SUCH LABELS WITH AN IMPROVED DEVICE TO MAKE THEM INOPERATIVE. |
WO1991009387A1 (en) * | 1989-12-20 | 1991-06-27 | Actron Entwicklungs Ag | Deactivatable resonance label |
EP0454021A1 (en) * | 1990-04-25 | 1991-10-30 | Actron Entwicklungs AG | Method for deactivating a resonant tag and circuit for carrying out this method |
US5257010A (en) * | 1990-04-25 | 1993-10-26 | Actron Entwicklungs | Process for the deactivation of a reasonance label and circuit arrangement for the execution of the process |
FR2666433A1 (en) * | 1990-09-04 | 1992-03-06 | Monarch Marking Systems Inc | DISABLED LABEL FOR ELECTRONIC MONITORING OF ARTICLES, STRIP OF SUCH LABELS AND METHOD FOR MANUFACTURING SUCH STRIP OF LABELS. |
Also Published As
Publication number | Publication date |
---|---|
SE460809B (en) | 1989-11-20 |
SE8505999D0 (en) | 1985-12-18 |
GB2173073B (en) | 1988-01-13 |
EP0181327A1 (en) | 1986-05-21 |
GB8531530D0 (en) | 1986-02-05 |
NL8420106A (en) | 1986-03-03 |
EP0181327B2 (en) | 1997-07-23 |
US4567473A (en) | 1986-01-28 |
CH669858A5 (en) | 1989-04-14 |
NL193507C (en) | 1999-12-03 |
GB2173073A (en) | 1986-10-01 |
SE8505999L (en) | 1985-12-18 |
NL193507B (en) | 1999-08-02 |
US4498076A (en) | 1985-02-05 |
EP0181327A4 (en) | 1986-09-22 |
EP0181327B1 (en) | 1990-09-05 |
CH669858C2 (en) | 1995-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4498076A (en) | Resonant tag and deactivator for use in an electronic security system | |
AU656437B2 (en) | Security tag with electrostatic protection | |
EP0463233B1 (en) | Activatable/deactivatable security tag for use with an electronic security system | |
US6400271B1 (en) | Activate/deactiveable security tag with enhanced electronic protection for use with an electronic security system | |
AU2001240056A1 (en) | Activatable/deactivatable security tag with enhanced electrostatic protection for use with an electronic security system | |
AU2001240056A2 (en) | Activatable/deactivatable security tag with enhanced electrostatic protection for use with an electronic security system | |
WO1990009011A1 (en) | Electronic article surveillance device with remote deactivation | |
AU678198B2 (en) | Detection tag | |
AU584306B2 (en) | Electronically detectable and deactivatable security tag | |
CA1227847A (en) | Resonant tag and deactivator for use in an electronic security system | |
NZ208526A (en) | Deactivation of security system resonant tag | |
KR930000136B1 (en) | Resonant tog and deactivator for use in an electronic security system | |
IE56656B1 (en) | Resonant tag and deactivator for use in an electronic security system | |
EP1540614A2 (en) | Deactivatable radio frequency security label | |
DE3490695C2 (en) | Resonant tag and deactivator for electronic security system | |
AT405697B (en) | Deactivatable resonant circuit | |
PL155969B1 (en) | Resonance circuit of an identifier for protection systems | |
SK470084A3 (en) | Electronic detectable and deactivated card |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Designated state(s): AT AU BR CH DE DK FI GB HU JP KP LU MC NL NO RO SE SU |
|
AL | Designated countries for regional patents |
Designated state(s): BE FR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 85059996 Country of ref document: SE |
|
WWP | Wipo information: published in national office |
Ref document number: 85059996 Country of ref document: SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 855116 Country of ref document: FI |
|
ENP | Entry into the national phase |
Ref document number: 1984 9068 Country of ref document: AT Date of ref document: 19851107 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1984901894 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1984901894 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
RET | De translation (de og part 6b) |
Ref document number: 3490695 Country of ref document: DE Date of ref document: 19860918 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 3490695 Country of ref document: DE |
|
WWG | Wipo information: grant in national office |
Ref document number: 1984901894 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 855116 Country of ref document: FI |