|Publication number||US3439320 A|
|Publication date||15 Apr 1969|
|Filing date||21 Sep 1967|
|Priority date||21 Sep 1967|
|Publication number||US 3439320 A, US 3439320A, US-A-3439320, US3439320 A, US3439320A|
|Inventors||James E Ward|
|Original Assignee||Relton Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (126), Classifications (10)|
|External Links: USPTO, USPTO Assignment, Espacenet|
J. E. WARD PERSONNEL LOCATION SYSTEM Filed Sept. 21, 1967 l VVENTOR.
3,439,320 PERSONNEL LOCATION SYSTEM llames E. Ward, Glendora, Calif., assignor to Relton Corporation, Arcadia, Calif., a corporation of California Filed Sept. 21, 1967, Ser. No. 669,610 lnt. Cl. G01s 3/80 US. Cl. 340-16 7 Claims ABSTRACT OF THE DISCLOSURE of the location of this person at a designated area. Preferably, the indication is maintained until the person moves to a different area and actuates his transmitter there.
Background of the invention This invention relates to communication between a plurality of persons and a central point and, more particularly, to an indication system for locating personnel at a large facility.
At large business establishments, hospitals, construction sites, and other extended areas of activity, provision must be made for communicating with personnel that move about the area in the course of their work. Most known systems for accomplishing this type of communication have disadvantages of one sort or another that must be taken into consideration and weighed when selection of a particular system is made. For the most part, the person sought is paged in one way or another.
Probably the most commonly employed paging system is a public address network in which the name of the person sought is .announced over loudspeakers distributed throughout the entire facility. Communication in this type of system is not selective, i.e., the pages are heard by everyone within the facility regardless of whether or not a person is affected by the announcement being made. Continual paging over such a public address network often disturbs the personnel and therefore reduces the efficiency of their activities.
Other paging systems are selective and therefore do not disturb personnel who are not concerned with the page. These systems employ one or more radio frequency transmitters distributed throughout the facility. The transmitters are capable of producing one of a plurality of different frequencies. Each person to be paged has in his possession a radio receiver tuned to a unique one of these frequencies. To communicate with a person, his unique frequency is broadcast by all the transmitters, thereby producing only in his receiver an audible indication that can be heard by him. This type of system requires a portable source of electrical energy in each receiver on which a current drain is continually imposed as long as the receiver is in a stand-by condition. When the energy source is expended, it must be replaced or recharged in order to maintain its operation.
on the concept that personnel are located in response to signals sent out by them each time they move to a different nited States Patent O designated area at a facility. Specifically, each person has in his possession a transmitter capable of producing a locating signal having a unique frequency. Each area or room at the facility to be designated is provided with a transducer or receiver capable of sensing all the unique frequencies assigned to the personnel. The transducers are all coupled to a centrally located display panel capable of indicating the designated area in which each person is located. When a person actuates his transmitter, thereby sending a locating signal to the transducer in the area or room in which he is located, control circuitry determines which unique frequency is being received at the central location and which transducer is sensing this unique frequency. An indication of the location of the person sending the signal at one of the designated areas is then produced on the display panel responsive to the control circuitry. Most advantageously, this indication is maintained on the display panel until the person sends out a signal from his transmitter in a diiferent designated area, at which time a new indication replaces the original one.
Preferably, the locating signals are produced by ultrasonic sound transmitters. In such case, the system produces no audible sounds that may disturb other personnel, and no portable sources of electrical energy are required for the units in the possession of the person to be located. The energy for actuating the ultrasonic transmitter could be provided by the person operating the transmitter in the form of a hammer blow on an ultrasonic resonant tuning fork or the like.
Brief description of the drawing The features of a specic embodiment of the invention are illustrated in the drawing, in which:
FIG. 1 is a schematic diagram in block form of a communication system incorporating the principles of the invention; and
FIG. 2 is a circuit schematic diagram of a portion of the display panel control circuitry of FIG. 1.
Description of a specific embodiment In connection with FIG. l, a personnel location system is described that indicates the location of ve persons designated JIM, MAX, BUD, JOE, and BILL at one of three areas of a facility designated ROOM 1, ROOM 2, and ROOM 3. Each person is provided with a transmitter capable of producing an ultrasonic sound signal having a unique frequency. The ultrasonic frequencies are designated f1, f2, f3, f4, and f5. Preferably, the ultrasonic transmitters are of the type that produce ultrasonic signals in response to a hammer blow so that no portable source of electrical energy is required in the transmitters. Such ultrasonic transmitters are in common use to control remotely commercial television receiver sets in the home. Instead, a portable power source could be used to give a constant signal or a selectively intermittent signal. The areas encompassed by ROOM 1, ROOM 2, and ROOM 3 are represented schematically in FIG. 1 by blocks 10, 11, and 12, respectively. Ultrasonic transducers or receivers 13, 14, and 15, which each have a band width sufficiently wide to sense all of the frequencies f1 through f5, are provided in ROOM 1, ROOM 2, and ROOM 3, respectively. Transducers 13, 14, and 15, which convert ultrasonic sound energy to electrical energy, are coupled through ampliers 16, 17, and 18, respectively, to centrally located display panel control circuitry 19. A display panel 20 in the form of a grid with rows and columns of indicators, such as lamps, is also provided at the centrally located point. Each indicator on display panel 20 is situated in a square area of the grid. One horizontal row of indicators is provided for each room to be designated,
and one vertical column of indicators is provided for each person to be identified.
When a person enters a room, he actuates his transmitter, thereby sending an ultrasonic signal to display panel control circuitry 19. This is illustrated in FIG. 1 by an ultrasonic transmitter 21 in ROOM 1 that produces an ultrasonic sound signal at frequency f1 assigned to JIM. The ultrasonic sound signal is represented at 22. Display panel control circuitry 19 senses which one or more of the frequencies f1 through f5 is being sent and which transducer is receiving this frequency. On the basis of this information, the location of the person involved at a designated area is determined and indicated on display panel 20 responsive to control circuitry 19. Following the assumption that transmitter 21 is actuated in ROOM 1, a lamp is lit in the upper left-hand square on display panel 20, designated 23. The lamp remains lit in square 23 until transmitter 21 is actuated in a different room, at which time a new indication replaces the indication in square 23. The central operator can then inform interested people as to JIMs precise whereabouts or can communicate directly with him without disturbing anyone other than the occupants of his room.
In FIG. 2, a schematic circuit diagram of that portion of display panel control circuitry 19 associated with ROOM 1 is shown. The same circuitry would be repeated for ROOM 2 and ROOM 3. Lamps corresponding to each of the ve squares in the row for ROOM 1 are energized under the control of relays. The control coil of each relay is designated by a capital letter, and its contacts are designated by small letters corresponding to the capital letters with different subscripts Where plural contacts are involved. In accordance with well-accepted practice, normally open contacts are designated by a cross and normally closed contacts are designated by a slash. Relay coils A, B, and C are labeled SR and SO to designate that they are slow operating and slow releasing relays. The remaining relays are assumed to operate and release instantaneously. Three out of the five indicator lamps for ROOM 1, designated 30, 31, and 32, and the associated control circuitry are shown in FIG. 2. Identical circuitry would be employed for the other lamps associated with ROOM 1. The output of amplifier 16 (FIG. 1) is connected through a filter 33 to relay coil A, through filter 34 to relay coil B, and through filter 35 to relay coil C. Filters 33, 34, and 35 are selective filters having narrow bands that will pass only the frequency assigned to the person identified by the corresponding column of display panel 20, namely frequencies f1, f2, and f5, respectively. On the application of a signal at frequency f1, relay coil D operates immediately to complete a circuit through contact d to relay coil X. As described in detail below, the operation of relay coil X serves to deenergize any other lamps in the column of display panel 20 identifying JIMs location. After a short delay, relay coil A operates. Consequently, contact a3 opens to interrupt the energizing circuit for relay coil D, so that relay coil X releases. Contact a1 closes to complete a circuit from a source 36 of positive potential to lamp 30. Contact a2 closes to complete a latching circuit from source 36 to relay coil A. As a result, relay coil A remains latched after the signal received from ROOM 1 terminates. Relay coil A remains latched and indicator lamp 30 remains lit until transmitter 21 (FIG. 1) sends an ultrasonic signal to the transducer in a different room.
The outputs of the filters corresponding to filter 33 that select the frequency f1 from the transducers leading from the other rooms are also connected to relay coil X through a normally open contact controlled by a coil corresponding to coil D. As in the case of lamp 30 and relay coil A, relay coil X has a normally closed contact in the latching circuit for the lamp energizing the relay coils for ROOMS 2 and 3. Whenever a signal at frequency f1 is received from the transducers in any of the rooms, relay coil X is energized for a short period of time as described above, thereby opening the latching circuit for the lamps in the corresponding column. Accordingly, any previously energized lamp in the column is extinguished and the lamp in the row corresponding to the transducer from which the signal is being received becomes lit.
The control circuitry associated with the lamps in the other columns operates in the same manner. Relay coils B and C correspond to relay coil A; relay coils E and G correspond to relay coil D; and relay coils Y and Z correspond to relay coil X.
What is claimed is:
1. A communication system comprising;
a plurality of portable transmitters each generating a unique signal;
a plurality of fixed receivers positioned to cover different areas at a facility, each receiver being capable of sensing any of the unique signals generated by the transmitters;
a display capable of individually indicating the receivers and the transmitters; and
means connected between the plurality of receivers and the display for indicating on the display which receivers are sensing signals and which transmitters are producing the signals sensed by the respective receivers.
2. The communication system of claim 1, in which the transmitters each generate an ultrasonic sound signal and the receivers are ultrasonic transducers capable of converting ultrasonic sound energy into electrical energy.
3. The communication system of claim 1, in which the transmitters each generate a signal having a unique frequency and the receivers are capable of sensing signals having the frequencies of all the transmitters.
4. The communication system of claim 1, in which the indicating means retains an indication that a receiver is sensing the unique signal produced by a transmitter until another receiver senses the unique signal produced by the same transmitter, causing the indicating means to indicate that the other receiver is sensing the unique signal.
5. The communication system of claim 1, in which the display has a plurality of indicators equal in number to the product of the number of transmitters and the number of receivers and the indicating means comprises control circuitry that energizes the indicator corresponding to the receiver sensing a signal and the transmitter sending the sensed signal.
6. The communication system of claim 1, in which the display forms a grid having a number of areas equal to the product of the number of transmitters and the number of receivers, an indicator being located in each area, and the indicating means energizes the indicator corresponding to the receiver sensing the signal and the transmitter sending the sensed signal.
'7. The communication system of claim 1, in which the display forms a grid of areas arranged in rows and columns, the grid has a column corresponding to each transmitter and a row corresponding to each receiver, an indicator is located in each area, and the indicating means energizes the indicator in the area Where the row that corresponds to the receiver sensing a signal and the column that corresponds to the transmitter generating the sensed signal intersect.
References Cited 3,238,503 3/1966 Uitermark et al. 340-311 X RICHARD A. FARLEY, Primary Examiner.
U.S. C1. X.R.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2499475 *||15 Apr 1947||7 Mar 1950||Ericsson Telefon Ab L M||Device for registering the locations of personnel|
|US2535162 *||4 Aug 1945||26 Dec 1950||Philco Corp||Position indication and control system for moving objects or vehicles|
|US3115622 *||15 Oct 1958||24 Dec 1963||Polard Electronics Corp||Panoramic scanning counter|
|US3238503 *||23 Feb 1960||1 Mar 1966||Philips Corp||Frequency responsive signalling system employing selective plural frequencies|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3573620 *||31 May 1968||6 Apr 1971||Ashley John Raymond||Security system with inductive to rf communications links|
|US3657715 *||13 Apr 1970||18 Apr 1972||Curtin William J||Ultrasonic paging system|
|US3696384 *||8 Jul 1971||3 Oct 1972||Recognition Devices||Ultrasonic tracking and locating system|
|US3739329 *||24 May 1971||12 Jun 1973||Recognition Devices||Electronic system for locating|
|US3805227 *||3 Oct 1972||16 Apr 1974||Rcds Enterprises Inc||Electronic tracking locating system using multiple frequency, modulated, and time delayed ultrasonic signals|
|US3805265 *||6 Oct 1971||16 Apr 1974||Rcds Enterprises Inc||Radiant wave locating system|
|US4225953 *||29 Sep 1978||30 Sep 1980||Simon William F||Personnel locator|
|US4237344 *||20 Apr 1979||2 Dec 1980||Hospital Communication Systems, Inc.||Rapid response health care communications system|
|US4275385 *||13 Aug 1979||23 Jun 1981||Bell Telephone Laboratories, Incorporated||Infrared personnel locator system|
|US4740788 *||6 Oct 1986||26 Apr 1988||Konneker Lloyd K||Method of providing location dependent visitor dispatching service|
|US4814751 *||27 Jun 1988||21 Mar 1989||Wildlife Materials, Inc.||Patient tracking system|
|US4835372 *||24 Jul 1987||30 May 1989||Clincom Incorporated||Patient care system|
|US4850009 *||31 May 1988||18 Jul 1989||Clinicom Incorporated||Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station|
|US4857716 *||8 Jun 1988||15 Aug 1989||Clinicom Incorporated||Patient identification and verification system and method|
|US4864313 *||18 Feb 1987||5 Sep 1989||Konneker Lloyd K||Voting method of locating mobile objects|
|US4906853 *||17 Mar 1988||6 Mar 1990||United Manufacturing Co., Inc.||Apparatus and method for varying the timing of a control signal|
|US4955000 *||16 Jun 1989||4 Sep 1990||Nac Engineering And Marketing, Inc.||Ultrasonic personnel location identification system|
|US5027314 *||7 Mar 1990||25 Jun 1991||United Manufacturing Co., Inc.||Apparatus and method for position reporting|
|US5291399 *||27 Jul 1990||1 Mar 1994||Executone Information Systems, Inc.||Method and apparatus for accessing a portable personal database as for a hospital environment|
|US5317309 *||21 Sep 1992||31 May 1994||Westinghouse Electric Corp.||Dual mode electronic identification system|
|US5396224 *||22 Nov 1991||7 Mar 1995||Hewlett-Packard Company||Telemetered patient location system and method|
|US5426425 *||7 Oct 1992||20 Jun 1995||Wescom, Inc.||Intelligent locator system with multiple bits represented in each pulse|
|US5465082 *||3 Aug 1992||7 Nov 1995||Executone Information Systems, Inc.||Apparatus for automating routine communication in a facility|
|US5479408 *||22 Feb 1994||26 Dec 1995||Will; Craig A.||Wireless personal paging, communications, and locating system|
|US5524129 *||23 Jun 1994||4 Jun 1996||Ronald K. Pettigrew||Portable counter and data storage system|
|US5561412 *||12 Jul 1993||1 Oct 1996||Hill-Rom, Inc.||Patient/nurse call system|
|US5588009 *||3 Feb 1994||24 Dec 1996||Will; Craig A.||Personal paging, communications, and locating system|
|US5627524 *||2 Mar 1995||6 May 1997||Lifecom, Llc||Infrared locator system|
|US5640157 *||29 Nov 1995||17 Jun 1997||Hollandse Signaalapparaten B.V.||Information system for a ship|
|US5822544 *||20 Apr 1995||13 Oct 1998||Executone Information Systems, Inc.||Patient care and communication system|
|US5838223 *||23 Aug 1996||17 Nov 1998||Hill-Rom, Inc.||Patient/nurse call system|
|US5892817 *||10 Jul 1995||6 Apr 1999||Will; Craig Alexander||Wireless system for alerting individual to incoming telephone call|
|US5970388 *||26 Dec 1996||19 Oct 1999||Will; Craig A.||Wireless system for indicating an incoming telephone call and controlling its transfer|
|US6046687 *||10 Mar 1997||4 Apr 2000||Trimble Navigation Limited||Clandsetine location reporting for missing vehicles|
|US6292106 *||13 Oct 1998||18 Sep 2001||Cubic Defense Systems, Inc.||Acoustical system and method for simultaneously locating and tracking multiple personnel in rooms of a building|
|US6344794||7 Jan 2000||5 Feb 2002||Hill-Rom, Inc.||Personnel and asset tracking method and apparatus|
|US6462656||29 Dec 2000||8 Oct 2002||Hill-Rom Services, Inc.||Personnel and asset tracking method and apparatus|
|US6759959||24 May 2002||6 Jul 2004||Hill-Rom Services, Inc.||Waste segregation compliance system|
|US6825763||7 Oct 2002||30 Nov 2004||Hill-Rom Services, Inc.||Personnel and asset tracking method and apparatus|
|US6958706||18 Jun 2001||25 Oct 2005||Hill-Rom Services, Inc.||Patient care and communication system|
|US6972683||19 Jul 2002||6 Dec 2005||Hill-Rom Services, Inc.||Badge for a locating and tracking system|
|US6980111||2 Aug 2002||27 Dec 2005||Hill-Rom Services, Inc.||Medication tracking system|
|US6982639 *||26 Nov 2002||3 Jan 2006||Ge Medical Systems Information Technologies, Inc.||Wireless subject locator|
|US7010369||6 May 2003||7 Mar 2006||Hill-Rom Services, Inc.||Medical equipment controller|
|US7042337||8 Jan 2002||9 May 2006||Hill-Rom Services, Inc.||Communication and data entry device|
|US7061396||13 Apr 1995||13 Jun 2006||Dwyer Precision Products, Inc.||Intelligent locator system|
|US7092376||1 Apr 2002||15 Aug 2006||Hill-Rom Services, Inc.||Hospital bed and network system|
|US7119688||6 Jul 2004||10 Oct 2006||Hill-Rom Services, Inc.||Waste segregation compliance system|
|US7242306||12 Apr 2004||10 Jul 2007||Hill-Rom Services, Inc.||Article locating and tracking apparatus and method|
|US7248933||8 May 2002||24 Jul 2007||Hill-Rom Services, Inc.||Article locating and tracking system|
|US7315535||11 Jan 2006||1 Jan 2008||Hill-Rom Services, Inc.||Information management system for bed data|
|US7319386||27 Jul 2005||15 Jan 2008||Hill-Rom Services, Inc.||Configurable system for alerting caregivers|
|US7450024||28 Jun 2007||11 Nov 2008||Hill-Rom Services, Inc.||Article locating and tracking apparatus and method|
|US7483338||12 Dec 2003||27 Jan 2009||Gencsus||Ultrasonic locator system and method|
|US7486189||26 Apr 2006||3 Feb 2009||Rf Code, Inc||RFID systems and methods employing infrared localization|
|US7715387||19 Dec 2007||11 May 2010||Hill-Rom Services, Inc.||Healthcare computer system with intra-room network|
|US7734476||29 Sep 2003||8 Jun 2010||Hill-Rom Services, Inc.||Universal communications, monitoring, tracking, and control system for a healthcare facility|
|US7746218||20 Dec 2007||29 Jun 2010||Hill-Rom Services, Inc.||Configurable system for alerting caregivers|
|US7831447||9 Apr 2010||9 Nov 2010||Hill-Rom Services, Inc.||Healthcare computer system|
|US7852208||7 Feb 2007||14 Dec 2010||Hill-Rom Services, Inc.||Wireless bed connectivity|
|US7868740||29 Aug 2007||11 Jan 2011||Hill-Rom Services, Inc.||Association of support surfaces and beds|
|US8031057||7 Dec 2010||4 Oct 2011||Hill-Rom Services, Inc.||Association of support surfaces and beds|
|US8031069||14 Jan 2008||4 Oct 2011||Oded Yair Cohn||Electronic security seal and system|
|US8046625||12 Feb 2009||25 Oct 2011||Hill-Rom Services, Inc.||Distributed fault tolerant architecture for a healthcare communication system|
|US8120471||4 Dec 2009||21 Feb 2012||Hill-Rom Services, Inc.||Hospital bed with network interface unit|
|US8169304||12 Feb 2009||1 May 2012||Hill-Rom Services, Inc.||User station for healthcare communication system|
|US8272892||28 May 2008||25 Sep 2012||Hill-Rom Services, Inc.||Hospital bed having wireless data capability|
|US8284047||3 Dec 2010||9 Oct 2012||Hill-Rom Services, Inc.||Wireless bed connectivity|
|US8305842||6 May 2008||6 Nov 2012||Merlin360.Com Limited||Location system for asset or personnel tracking using multi-frequency ultrasonic transducers and goertzel filters|
|US8384526||12 Feb 2009||26 Feb 2013||Hill-Rom Services, Inc.||Indicator apparatus for healthcare communication system|
|US8392747||23 Sep 2011||5 Mar 2013||Hill-Rom Services, Inc.||Distributed fault tolerant architecture for a healthcare communication system|
|US8421606||23 Dec 2011||16 Apr 2013||Hill-Rom Services, Inc.||Wireless bed locating system|
|US8456286||11 Apr 2012||4 Jun 2013||Hill-Rom Services, Inc.||User station for healthcare communication system|
|US8461968||29 Aug 2007||11 Jun 2013||Hill-Rom Services, Inc.||Mattress for a hospital bed for use in a healthcare facility and management of same|
|US8536990||24 Jan 2012||17 Sep 2013||Hill-Rom Services, Inc.||Hospital bed with nurse call system interface unit|
|US8598995||12 Feb 2009||3 Dec 2013||Hill-Rom Services, Inc.||Distributed healthcare communication system|
|US8604916||23 Sep 2011||10 Dec 2013||Hill-Rom Services, Inc.||Association of support surfaces and beds|
|US8604917||28 Sep 2012||10 Dec 2013||Hill-Rom Services, Inc.||Hospital bed having user input to enable and suspend remote monitoring of alert conditions|
|US8762766||20 Feb 2013||24 Jun 2014||Hill-Rom Services, Inc.||Distributed fault tolerant architecture for a healthcare communication system|
|US8779924||24 Feb 2010||15 Jul 2014||Hill-Rom Services, Inc.||Nurse call system with additional status board|
|US8803669||3 Jun 2013||12 Aug 2014||Hill-Rom Services, Inc.||User station for healthcare communication system|
|US8866598||11 Sep 2013||21 Oct 2014||Hill-Rom Services, Inc.||Healthcare communication system with whiteboard|
|US8917166||6 Dec 2013||23 Dec 2014||Hill-Rom Services, Inc.||Hospital bed networking system and method|
|US9050031||9 Oct 2014||9 Jun 2015||Hill-Rom Services, Inc.||Healthcare communication system having configurable alarm rules|
|US9142923||13 May 2014||22 Sep 2015||Hill-Rom Services, Inc.||Hospital bed having wireless data and locating capability|
|US9235972||29 May 2013||12 Jan 2016||Pragmatus Mobile LLC||Personal security and tracking system|
|US9235979||6 Aug 2014||12 Jan 2016||Hill-Rom Services, Inc.||User station for healthcare communication system|
|US9299242||27 Nov 2013||29 Mar 2016||Hill-Rom Services, Inc.||Distributed healthcare communication system|
|US9336672||14 Apr 2015||10 May 2016||Hill-Rom Services, Inc.||Healthcare communication system for programming bed alarms|
|US9411934||8 May 2012||9 Aug 2016||Hill-Rom Services, Inc.||In-room alarm configuration of nurse call system|
|US9513899||26 Nov 2014||6 Dec 2016||Hill-Rom Services, Inc.||System wide firmware updates to networked hospital beds|
|US9517034||26 Feb 2016||13 Dec 2016||Hill-Rom Services, Inc.||Healthcare communication system for programming bed alarms|
|US9517035||25 Feb 2016||13 Dec 2016||Hill-Rom Services, Inc.||Distributed healthcare communication system|
|US9572737||14 Aug 2015||21 Feb 2017||Hill-Rom Services, Inc.||Hospital bed having communication modules|
|US9734293||16 Jun 2014||15 Aug 2017||Hill-Rom Services, Inc.||System and method for association of patient care devices to a patient|
|US9775519||24 Oct 2016||3 Oct 2017||Hill-Rom Services, Inc.||Network connectivity unit for hospital bed|
|US20020044043 *||18 Jun 2001||18 Apr 2002||John Chaco||Patient care and communication system|
|US20020183979 *||8 May 2002||5 Dec 2002||Wildman Timothy D.||Article locating and tracking system|
|US20030090387 *||19 Jul 2002||15 May 2003||James Lestienne||Badge for a locating and tracking system|
|US20040100377 *||26 Nov 2002||27 May 2004||Ge Medical Systems Information Technologies, Inc.||Wireless subject locator|
|US20040193449 *||29 Sep 2003||30 Sep 2004||Wildman Timothy D.||Universal communications, monitoring, tracking, and control system for a healthcare facility|
|US20040250004 *||6 Jul 2004||9 Dec 2004||Hill-Rom Services, Inc.||Waste segregation compliance system|
|US20050035862 *||12 Apr 2004||17 Feb 2005||Wildman Timothy D.||Article locating and tracking apparatus and method|
|US20050128099 *||12 Dec 2003||16 Jun 2005||Edwards Systems Technology, Inc.||Ultrasonic locator system and method|
|US20050151641 *||3 Nov 2004||14 Jul 2005||Hill-Rom Services, Inc.||Personnel and asset tracking method and apparatus|
|US20060114888 *||11 Jan 2006||1 Jun 2006||Schuman Richard J||Information management system for bed data|
|US20060261951 *||26 Apr 2006||23 Nov 2006||Rf Code, Inc.||RFID systems and methods employing infrared localization|
|US20070072676 *||29 Sep 2005||29 Mar 2007||Shumeet Baluja||Using information from user-video game interactions to target advertisements, such as advertisements to be served in video games for example|
|US20070080801 *||18 Oct 2004||12 Apr 2007||Weismiller Matthew W||Universal communications, monitoring, tracking, and control system for a healthcare facility|
|US20070210917 *||7 Feb 2007||13 Sep 2007||Collins Williams F Jr||Wireless bed connectivity|
|US20080094207 *||20 Dec 2007||24 Apr 2008||Collins Williams F Jr||Configurable system for alerting caregivers|
|US20080095156 *||19 Dec 2007||24 Apr 2008||Schuman Richard J||Healthcare computer system with intra-room network|
|US20080189132 *||5 Feb 2007||7 Aug 2008||Matthew Minson||Automatic Hospital Bed Accounting System|
|US20080224861 *||28 May 2008||18 Sep 2008||Mcneely Craig A||Hospital bed having wireless data capability|
|US20090056027 *||29 Aug 2007||5 Mar 2009||Hill-Rom Services, Inc.||Mattress for a hospital bed for use in a healthcare facility and management of same|
|US20090179757 *||14 Jan 2008||16 Jul 2009||Cohn Oded Yair||Electronic security seal and system|
|US20090212925 *||12 Feb 2009||27 Aug 2009||Schuman Sr Richard Joseph||User station for healthcare communication system|
|US20090212956 *||12 Feb 2009||27 Aug 2009||Schuman Richard J||Distributed healthcare communication system|
|US20090217080 *||12 Feb 2009||27 Aug 2009||Ferguson David C||Distributed fault tolerant architecture for a healthcare communication system|
|US20100102965 *||6 May 2008||29 Apr 2010||Merlin360.Com Limited||Location system, for asset or personnel tracking|
|US20110072583 *||7 Dec 2010||31 Mar 2011||Mcneely Craig A||Association of support surfaces and beds|
|US20110074571 *||3 Dec 2010||31 Mar 2011||Collins Jr Williams F||Wireless bed connectivity|
|US20110205062 *||24 Feb 2010||25 Aug 2011||Pesot Whitney W||Nurse call system with additional status board|
|DE2232946A1 *||5 Jul 1972||18 Jan 1973||Recognition Devices||Ultraschall-ortungsanlage|
|DE3210002A1 *||19 Mar 1982||22 Sep 1983||Zettler Elektrotechn Alois||Presence display|
|DE102005040069A1 *||24 Aug 2005||15 Mar 2007||Siemens Ag||Verfahren und Kommunikationssystem zur Positionsbestimmung einer Kommunikationseinrichtung|
|U.S. Classification||367/191, 367/111, 340/572.1, 367/910, 367/117, 340/8.1|
|Cooperative Classification||G08B3/1008, Y10S367/91|