|
| US3981011 | 31 Mar 1975 | 14 Sep 1976 | Sperry Rand Corporation | Object identification system using an RF roll-call technique |
| US4019181 | 9 Jul 1975 | 19 Apr 1977 | U.S. Philips Corporation | Transponder system |
| US4027840 | 30 Sep 1975 | 7 Jun 1977 | International Standard Electric Corporation | Vehicle position indicator with radar interrogation each of spaced transponders disposed along a pathway for the vehicle |
| US4059831 | 6 Oct 1975 | 22 Nov 1977 | Northwestern University | Passive transponders using acoustic surface wave devices |
| US4096477 | 22 Apr 1977 | 20 Jun 1978 | Northwestern University | Identification system using coded passive transponders |
| US4242671 | 8 Dec 1978 | 30 Dec 1980 | | Transponders |
| US4263595 | 15 May 1979 | 21 Apr 1981 | Siemens Aktiengesellschaft | Apparatus for identifying objects and persons |
| US4399441 | 19 Jan 1981 | 16 Aug 1983 | Unisearch Limited | Apparatus for remote temperature reading |
| US4604623 | 30 Jun 1983 | 5 Aug 1986 | X-Cyte Inc. | Surface acoustic wave passive transponder having non-reflective transducers and pads |
| US4605929 | 30 Jun 1983 | 12 Aug 1986 | X-Cyte Inc. | Surface acoustic wave passive transponder having optimally-sized transducers |
| US4620191 | 30 Jun 1983 | 28 Oct 1986 | | Surface acoustic wave passive transponder having parallel acoustic wave paths |
| US4625207 | 30 Jun 1983 | 25 Nov 1986 | X-Cyte Inc. | Surface acoustic wave passive transponder having amplitude and phase-modifying surface pads |
| US4625208 | 30 Jun 1983 | 25 Nov 1986 | X-Cyte Inc. | Surface acoustic wave passive transponder having acoustic wave reflectors |
| US4658252 | 7 Jul 1986 | 14 Apr 1987 | GTE Government Systems Corporation | Encoder/decoder for card entry system |
| US4698631 | 17 Dec 1986 | 6 Oct 1987 | Hughes Tool Company | Surface acoustic wave pipe identification system |
| US4725841 | 30 Jun 1983 | 16 Feb 1988 | X-Cyte, Inc. | System for interrogating a passive transponder carrying phase-encoded information |
| US4734698 | 31 Oct 1985 | 29 Mar 1988 | X-Cyte, Inc. | Passive interrogator label system having offset compensation and temperature compensation for a surface acoustic wave transponder |
| US4746830 | 14 Mar 1986 | 24 May 1988 | | Electronic surveillance and identification |
| US4807140 | 9 Nov 1984 | 21 Feb 1989 | | Electronic label information exchange system |
| US4931664 | 2 Aug 1988 | 5 Jun 1990 | GTE Products Corporation | Controller for coded surface acoustical wave (SAW) security system |
| US4945354 | 25 Nov 1988 | 31 Jul 1990 | GTE Products | Spurious signal correction for surface acoustic wave (SAW) security devices |
| US4980680 | 20 Feb 1990 | 25 Dec 1990 | GTE Products Corp. and GTE Laboratories, Inc. | Coded surface acoustical wave (saw) motor vehicle security device |
| US5115160 | 28 Aug 1989 | 19 May 1992 | GTE Products | Easily encodable surface acoustic wave (SAW) security devices |
| US5130522 | 16 Aug 1990 | 14 Jul 1992 | Mitsubishi Jukogyo Kabushiki Kaisha | ID card using surface acoustic waves |
| US5423334 | 1 Feb 1993 | 13 Jun 1995 | C. R. Bard, Inc. | Implantable medical device characterization system |
| US5448110 | 14 Sep 1993 | 5 Sep 1995 | Micron communications, Inc. | Enclosed transceiver |
| US5469170 | 20 Oct 1994 | 21 Nov 1995 | The United States of America as represented by the Secretary of the Army | Passive SAW-ID tags using a chirp transducer |
| US5497140 | 17 Dec 1993 | 5 Mar 1996 | Micron Technology, Inc. | Electrically powered postage stamp or mailing or shipping label operative with radio frequency (RF) communication |
| US5776278 | 9 Jan 1997 | 7 Jul 1998 | Micron Communications, Inc. | Method of manufacturing an enclosed transceiver |
| US5779839 | 26 Sep 1997 | 14 Jul 1998 | Micron Communications, Inc. | Method of manufacturing an enclosed transceiver |
| US5952937 | 12 Mar 1997 | 14 Sep 1999 | UT Automotive Dearborn, Inc. | System and method of updating communications in a security system |
| US5986382 | 18 Aug 1997 | 16 Nov 1999 | X-Cyte, Inc. | Surface acoustic wave transponder configuration |
| US5988510 | 13 Feb 1997 | 23 Nov 1999 | Micron Communications, Inc. | Tamper resistant smart card and method of protecting data in a smart card |
| US6013949 | 22 Sep 1997 | 11 Jan 2000 | Micron Technology, Inc. | Miniature Radio Frequency Transceiver |
| US6060815 | 18 Aug 1997 | 9 May 2000 | X-Cyte, Inc. | Frequency mixing passive transponder |
| US6068192 | 30 Aug 1999 | 30 May 2000 | Micron Technology, Inc. | Tamper resistant smart card and method of protecting data in a smart card |
| US6075463 | 1 Jun 1998 | 13 Jun 2000 | AKO-Werke GmbH & Co. KG | Apparatus for wirelessly transmitting the temperature and an identifying characteristic of a cooking pot to a stove |
| US6078791 | 6 Aug 1997 | 20 Jun 2000 | Micron Communications, Inc. | Radio frequency identification transceiver and antenna |
| US6107910 | 18 Aug 1997 | 22 Aug 2000 | X-Cyte, Inc. | Dual mode transmitter/receiver and decoder for RF transponder tags |
| US6114971 | 18 Aug 1997 | 5 Sep 2000 | X-Cyte, Inc. | Frequency hopping spread spectrum passive acoustic wave identification device |
| US6150921 | 17 Oct 1997 | 21 Nov 2000 | PinPoint Corporation | Article tracking system |
| US6208062 | 10 Feb 1999 | 27 Mar 2001 | X-Cyte, Inc. | Surface acoustic wave transponder configuration |
| US6220516 | 16 Jan 1998 | 24 Apr 2001 | Micron Technology, Inc. | Method of manufacturing an enclosed transceiver |
| US6259991 | 10 Feb 1999 | 10 Jul 2001 | X-Cyte Inc. | Environmental location system |
| US6273339 | 19 Apr 2000 | 14 Aug 2001 | Micron Technology, Inc. | Tamper resistant smart card and method of protecting data in a smart card |
| US6325294 | 1 Feb 2001 | 4 Dec 2001 | Micron Technology, Inc. | Method of manufacturing an enclosed transceiver |
| US6337659 | 25 Oct 1999 | 8 Jan 2002 | Gamma Nu, Inc. | Phased array base station antenna system having distributed low power amplifiers |
| US6483427 | 9 Mar 2000 | 19 Nov 2002 | RF Technologies, Inc. | Article tracking system |
| US6531957 | 17 May 2002 | 11 Mar 2003 | X-Cyte, Inc. | Dual mode transmitter-receiver and decoder for RF transponder tags |
| US6611224 | 14 May 2002 | 26 Aug 2003 | X-Cyte, Inc. | Backscatter transponder interrogation device |
| US6633226 | 10 Feb 1999 | 14 Oct 2003 | X-Cyte, Inc. | Frequency hopping spread spectrum passive acoustic wave identification device |
| US6775616 | 20 Aug 2003 | 10 Aug 2004 | X-Cyte, Inc. | Environmental location system |
| US6788204 | 2 Mar 2000 | 7 Sep 2004 | Nanotron Gesellschaft fur Mikrotechnik mbH | Surface-wave transducer device and identification system with such device |
| US6812824 | 2 Mar 2000 | 2 Nov 2004 | RF Technologies, Inc. | Method and apparatus combining a tracking system and a wireless communication system |
| US6825766 | 21 Dec 2001 | 30 Nov 2004 | Genei Industries, Inc. | Industrial data capture system including a choke point portal and tracking software for radio frequency identification of cargo |
| US6950009 | 17 Jun 2003 | 27 Sep 2005 | X-Cyte, Inc. | Dual mode transmitter/receiver and decoder for RF transponder units |
| US6995654 | 15 Dec 2000 | 7 Feb 2006 | X-Cyte, Inc. | Apparatus and method for locating a tagged item |
| US7023323 | 14 Oct 2003 | 4 Apr 2006 | X-Cyte, Inc. | Frequency hopping spread spectrum passive acoustic wave identification device |
| US7129828 | 20 Jul 2004 | 31 Oct 2006 | Honeywell International Inc. | Encapsulated surface acoustic wave sensor |
| US7132778 | 20 Aug 2003 | 7 Nov 2006 | X-Cyte, Inc. | Surface acoustic wave modulator |
| US7158031 | 10 Nov 2003 | 2 Jan 2007 | Micron Technology, Inc. | Thin, flexible, RFID label and system for use |
| US7265674 | 18 Aug 2005 | 4 Sep 2007 | Micron Technology, Inc. | Thin flexible, RFID labels, and method and apparatus for use |
| US7388488 | 30 Sep 2004 | 17 Jun 2008 | | Method and system for storing, retrieving, and managing data for tags |
| US7583192 | 11 Dec 2006 | 1 Sep 2009 | Keystone Technology Solutions, LLC | Radio frequency identification device and method |
| US7587050 | 28 Apr 2004 | 8 Sep 2009 | NXP B.V. | Method, system, base station and data carrier for clash-free transmission between a base station and a number of mobile data carriers |
| US7649463 | 30 Aug 2007 | 19 Jan 2010 | Keystone Technology Solutions, LLC | Radio frequency identification device and method |
| US7677439 | 16 Mar 2006 | 16 Mar 2010 | Marathon Oil Company | Process and assembly for identifying and tracking assets |
| US7714741 | 15 Jul 2008 | 11 May 2010 | Marathon Oil Company | Method and system for performing operations and for improving production in wells |
| US7741956 | 28 Jul 2004 | 22 Jun 2010 | X-Cyte, Inc. | Dual mode transmitter-receiver and decoder for RF transponder tags |
| US7746230 | 30 Aug 2007 | 29 Jun 2010 | Round Rock Research, LLC | Radio frequency identification device and method |
| US7839285 | 29 Aug 2007 | 23 Nov 2010 | Round Rock Resarch, LLC | Electronic communication devices, methods of forming electrical communication devices, and communications methods |
| US7948382 | 11 Sep 2006 | 24 May 2011 | Round Rock Research, LLC | Electronic communication devices, methods of forming electrical communication devices, and communications methods |
| US7956742 | 24 Jan 2007 | 7 Jun 2011 | Motedata Inc. | Method and system for storing, retrieving, and managing data for tags |
| US8018340 | 24 Oct 2006 | 13 Sep 2011 | Round Rock Research, LLC | System and method to track articles at a point of origin and at a point of destination using RFID |
| US8044820 | 11 May 2010 | 25 Oct 2011 | Marathon Oil Company | Method and system for performing operations and for improving production in wells |
| US8091775 | 16 Mar 2010 | 10 Jan 2012 | Marathon Oil Company | Process and assembly for identifying and tracking assets |
| USRE40137 | 10 Dec 2003 | 4 Mar 2008 | Micron Technology, Inc. | Methods for forming integrated circuits within substrates |
| USRE42773 | 4 Dec 2003 | 4 Oct 2011 | Round Rock Research, LLC | Method of manufacturing an enclosed transceiver |