3747086
3752960
3790945
3816708
Article surveillance
Patent #: 4063229
Issued on: 12/13/1977
Inventor: Welsh , et al.
Library circulation control system
Patent #: 4141078
Issued on: 02/20/1979
Inventor: Bridges, Jr. , et al.
Automatic library control apparatus
Patent #: 4153931
Issued on: 05/08/1979
Inventor: Green , et al.
Dual frequency band directional antenna system
Patent #: 4183027
Issued on: 01/08/1980
Inventor: Ehrenspeck
Identification system
Patent #: 4223830
Issued on: 09/23/1980
Inventor: Walton
Ferrite antenna
Patent #: 4312003
Issued on: 01/19/1982
Inventor: Robbins, Jr.
More ...
Automated token system
Patent #: 4319674
Issued on: 03/16/1982
Inventor: Riggs , et al.
Combined dipole and ferrite antenna
Patent #: 4407000
Issued on: 09/27/1983
Inventor: Sasaki , et al.
Combined radio and magnetic energy responsive surveillance marker and system
Patent #: 4413254
Issued on: 11/01/1983
Inventor: Pinneo , et al.
Electrically programmable read-only memory stacked above a semiconductor substrate
Patent #: 4442507
Issued on: 04/10/1984
Inventor: Roesner
Distributed capacitance lc resonant circuit
Patent #: 4578654
Issued on: 03/25/1986
Inventor: Tait
Electronic proximity identification system with simplified low power identifier
Patent #: 4580041
Issued on: 04/01/1986
Inventor: Walton
Checkout station to reduce retail theft
Patent #: 4583083
Issued on: 04/15/1986
Inventor: Bogasky
Distributed capacitance LC resonant circuit
Patent #: 4598276
Issued on: 07/01/1986
Inventor: Tait
LIMIS systems, devices and methods
Patent #: 4656463
Issued on: 04/07/1987
Inventor: Anders , et al.
Very large scale integrated circuit subdivided into isochronous regions, method for the machine-aided design of such a circuit, and method for the machine-aided testing of such a circuit
Patent #: 4656592
Issued on: 04/07/1987
Inventor: Spaanenburg , et al.
Rapid inventory data acquistion system
Patent #: 4673932
Issued on: 06/16/1987
Inventor: Ekchian , et al.
Method of collecting and using data associated with tagged objects
Patent #: 4688026
Issued on: 08/18/1987
Inventor: Scribner , et al.
RF reactivatable marker for electronic article surveillance system
Patent #: 4745401
Issued on: 05/17/1988
Inventor: Montean
Electronic surveillance and identification
Patent #: 4746830
Issued on: 05/24/1988
Inventor: Holland
Dual-status, magnetically imagable article surveillance marker
Patent #: 4746908
Issued on: 05/24/1988
Inventor: Montean
Antenna
Patent #: 4785308
Issued on: 11/15/1988
Inventor: Newcomb
Method of fabricating a high density masked programmable read-only memory
Patent #: 4796074
Issued on: 01/03/1989
Inventor: Roesner
Ferrite-core antenna
Patent #: 4805232
Issued on: 02/14/1989
Inventor: Ma
Manufacturing monitoring and control systems
Patent #: 4827395
Issued on: 05/02/1989
Inventor: Anders , et al.
Remote access personnel identification and tracking system
Patent #: 4837568
Issued on: 06/06/1989
Inventor: Snaper
Single chip transponder device
Patent #: 4857893
Issued on: 08/15/1989
Inventor: Carroll
Item identification tag for rapid inventory data acquisition system
Patent #: 4862160
Issued on: 08/29/1989
Inventor: Ekchian , et al.
Article removal control system
Patent #: 4881061
Issued on: 11/14/1989
Inventor: Chambers
Method of controlling communication in an ID system
Patent #: 4924210
Issued on: 05/08/1990
Inventor: Matsui, et al.
Self-checkout of produce items
Patent #: 4964053
Issued on: 10/16/1990
Inventor: Humble
Multi-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper
Patent #: 4967185
Issued on: 10/30/1990
Inventor: Montean
Radio frequency controlled interrogator-responder system with passive code generator
Patent #: 5019815
Issued on: 05/28/1991
Inventor: Lemelson, et al.
Identification system
Patent #: 5036308
Issued on: 07/30/1991
Inventor: Fockens
Method and apparatus for integrated data capture and electronic article surveillance
Patent #: 5059951
Issued on: 10/22/1991
Inventor: Kaltner
Discrete object searching apparatus for search of discrete files and the like
Patent #: 5063380
Issued on: 11/05/1991
Inventor: Wakura
Electromagnetic identification and location system
Patent #: 5072222
Issued on: 12/10/1991
Inventor: Fockens
Multi-layer thin-film EAS marker
Patent #: 5083112
Issued on: 01/21/1992
Inventor: Piotrowski, et al.
Method for reducing resistance for programmed antifuse
Patent #: 5095362
Issued on: 03/10/1992
Inventor: Roesner
Intelligent security system
Patent #: 5099226
Issued on: 03/24/1992
Inventor: Andrews
Proximity detecting apparatus
Patent #: 5099227
Issued on: 03/24/1992
Inventor: Geiszler, et al.
Electronic identification system
Patent #: 5103222
Issued on: 04/07/1992
Inventor: Hogen Esch, et al.
Resonant tag
Patent #: 5119070
Issued on: 06/02/1992
Inventor: Matsumoto, et al.
Electronic inventory label and security apparatus
Patent #: 5151684
Issued on: 09/29/1992
Inventor: Johnsen
Integrated circuit package label and/or manifest system
Patent #: 5153842
Issued on: 10/06/1992
Inventor: Dlugos, Sr., et al.
Magnetic marker and reading and identifying apparatus therefor
Patent #: 5204526
Issued on: 04/20/1993
Inventor: Yamashita, et al.
Multi-memory electronic identification tag
Patent #: 5214409
Issued on: 05/25/1993
Inventor: Beigel
Location of objects
Patent #: 5214410
Issued on: 05/25/1993
Inventor: Verster
Portable field-programmable detection microchip
Patent #: 5218343
Issued on: 06/08/1993
Inventor: Stobbe, et al.
Method and system for monitoring personnel
Patent #: 5218344
Issued on: 06/08/1993
Inventor: Ricketts
Article removal control system
Patent #: 5260690
Issued on: 11/09/1993
Inventor: Mann, et al.
Magnetic radio frequency tag reader for use with a hand-held terminal
Patent #: 5280159
Issued on: 01/18/1994
Inventor: Schultz, et al.
Library check out/check in system
Patent #: 5288980
Issued on: 02/22/1994
Inventor: Patel, et al.
Electrically alterable resistive component stacked above a semiconductor substrate
Patent #: 5296722
Issued on: 03/22/1994
Inventor: Potash, et al.
Dual mode electronic identification system
Patent #: 5317309
Issued on: 05/31/1994
Inventor: Vercellotti, et al.
Marker assembly for use with an electronic article surveillance system
Patent #: 5331313
Issued on: 07/19/1994
Inventor: Koning
Method and system for inventoring a distributed plurality of items on a supply
Patent #: 5334822
Issued on: 08/02/1994
Inventor: Sanford
Very low frequency tracking system
Patent #: 5339074
Issued on: 08/16/1994
Inventor: Shindley, et al.
Electronic identifier apparatus and method utilizing a single chip microcontroller and an antenna coil
Patent #: 5347263
Issued on: 09/13/1994
Inventor: Carroll, et al.
Frequency diversity transponder arrangement
Patent #: 5347280
Issued on: 09/13/1994
Inventor: Schuermann
Electronic article security system with digital signal processing and increased detection range
Patent #: 5353011
Issued on: 10/04/1994
Inventor: Wheeler, et al.
Housing structure for an access control RFID reader
Patent #: 5378880
Issued on: 01/03/1995
Inventor: Eberhardt
Anti-theft protection systems responsive to bath resonance and magnetization
Patent #: 5392028
Issued on: 02/21/1995
Inventor: Pichl
Surveillance marker and method of making same
Patent #: 5401584
Issued on: 03/28/1995
Inventor: Minasy, et al.
Anti-theft method for detecting the unauthorized opening of containers and baggage
Patent #: 5406263
Issued on: 04/11/1995
Inventor: Tuttle
Method of fabricating an electrically alterable resistive component on an insulating layer above a semiconductor substrate
Patent #: 5407851
Issued on: 04/18/1995
Inventor: Roesner
Method of producing a radio frequency transponder with a molded environmentally sealed package
Patent #: 5420757
Issued on: 05/30/1995
Inventor: Eberhardt, et al.
Transponding tag and method
Patent #: 5430441
Issued on: 07/04/1995
Inventor: Bickley, et al.
Identification card verification system
Patent #: 5432864
Issued on: 07/11/1995
Inventor: Lu, et al.
Radio frequency identification tag and method
Patent #: 5444223
Issued on: 08/22/1995
Inventor: Blama
RF tagging system including RF tags with variable frequency resonant circuits
Patent #: 5446447
Issued on: 08/29/1995
Inventor: Carney, et al.
Enclosed transceiver
Patent #: 5448110
Issued on: 09/05/1995
Inventor: Tuttle, et al.
Apparatus for transmitting contents information
Patent #: 5448220
Issued on: 09/05/1995
Inventor: Levy
Electronic missing file locator system
Patent #: 5450070
Issued on: 09/12/1995
Inventor: Massar, et al.
Transponder system with variable frequency transmission
Patent #: 5450492
Issued on: 09/12/1995
Inventor: Hook, et al.
Electronic tag with source certification capability
Patent #: 5469363
Issued on: 11/21/1995
Inventor: Saliga
Admission managing system
Patent #: 5471203
Issued on: 11/28/1995
Inventor: Sasaki, et al.
System for automated toll collection assisted by GPS technology
Patent #: 5490079
Issued on: 02/06/1996
Inventor: Sharpe, et al.
Electrically powered postage stamp or mailing or shipping label operative with radio frequency (RF) communication
Patent #: 5497140
Issued on: 03/05/1996
Inventor: Tuttle
Multi-memory electronic identification tag
Patent #: 5499017
Issued on: 03/12/1996
Inventor: Beigel
Dual frequency EAS tag with deactivation coil
Patent #: 5517195
Issued on: 05/14/1996
Inventor: Narlow, et al.
Detection of multiple articles
Patent #: 5519381
Issued on: 05/21/1996
Inventor: Marsh, et al.
Power-efficient technique for multiple tag discrimination
Patent #: 5521601
Issued on: 05/28/1996
Inventor: Kandlur, et al.
Radio frequency circuit and memory in thin flexible package
Patent #: 5528222
Issued on: 06/18/1996
Inventor: Moskowitz, et al.
Double tuned dipole antenna
Patent #: 5528251
Issued on: 06/18/1996
Inventor: Frein
Electronic identification system
Patent #: 5537105
Issued on: 07/16/1996
Inventor: Marsh, et al.
Time division multiplexed batch mode item identification system
Patent #: 5539394
Issued on: 07/23/1996
Inventor: Cato, et al.
Modulated spread spectrum in RF identification systems method
Patent #: 5539775
Issued on: 07/23/1996
Inventor: Tuttle, et al.
Security system for controlling building access
Patent #: 5541585
Issued on: 07/30/1996
Inventor: Duhame, et al.
Transponders, Interrogators, systems and methods for elimination of interrogator synchronization requirement
Patent #: 5541604
Issued on: 07/30/1996
Inventor: Meier
Multiple item radio frequency tag identification protocol
Patent #: 5550547
Issued on: 08/27/1996
Inventor: Chan, et al.
Encodable tag with radio frequency readout
Patent #: 5554974
Issued on: 09/10/1996
Inventor: Brady, et al.
Reader system for waste bin pickup vehicles
Patent #: 5565846
Issued on: 10/15/1996
Inventor: Geiszler, et al.
Electronic inventory system for stacked containers
Patent #: 5565858
Issued on: 10/15/1996
Inventor: Guthrie
Diagnostic magnetic resonance apparatus having a radio frequency shield between the radio frequency antenna and the gradient coil system
Patent #: 5574372
Issued on: 11/12/1996
Inventor: Moritz, et al.
Retail theft prevention and information device
Patent #: 5589820
Issued on: 12/31/1996
Inventor: Robinson, et al.
Magnetic marker for use in identification systems and an indentification system using such magnetic marker
Patent #: 5602527
Issued on: 02/11/1997
Inventor: Suenaga
Apparatus and method for identifying multiple transponders
Patent #: 5602538
Issued on: 02/11/1997
Inventor: Orthmann, et al.
RF tagging system with multiple decoding modalities
Patent #: 5604486
Issued on: 02/18/1997
Inventor: Lauro, et al.
Multi-bit EAS marker powered by interrogation signal in the eight MHz band
Patent #: 5625341
Issued on: 04/29/1997
Inventor: Giles, et al.
Information management and security system
Patent #: 5629981
Issued on: 05/13/1997
Inventor: Nerlikar
System and method for tracking vehicles in vehicle lots
Patent #: 5635693
Issued on: 06/03/1997
Inventor: Benson, et al.
Portable RF ID tag and barcode reader
Patent #: 5640002
Issued on: 06/17/1997
Inventor: Ruppert, et al.
Anti-theft method for detecting the unauthorized opening of containers and baggage
Patent #: 5646592
Issued on: 07/08/1997
Inventor: Tuttle
Electronic control system/network
Patent #: 5682142
Issued on: 10/28/1997
Inventor: Loosmore, et al.
Radio frequency identification tag
Patent #: 5682143
Issued on: 10/28/1997
Inventor: Brady, et al.
Object locator system and methods therefor
Patent #: 5689238
Issued on: 11/18/1997
Inventor: Cannon, Jr., et al.
Short-distance communication antenna and methods of manufacturing and using the short-distance communication antenna
Patent #: 5694139
Issued on: 12/02/1997
Inventor: Saito, et al.
Method and apparatus for detecting radioactive contamination in steel scrap
Patent #: 5705818
Issued on: 01/06/1998
Inventor: Kelbel, et al.
Zone-Based asset tracking and control system
Patent #: 5708423
Issued on: 01/13/1998
Inventor: Ghaffari, et al.
File folders for use in an electronic file locating and tracking system
Patent #: 5739765
Issued on: 04/14/1998
Inventor: Stanfield, et al.
Electronic article security system for store which uses intelligent security tags and transaction data
Patent #: 5745036
Issued on: 04/28/1998
Inventor: Clare
Voice activated electronic locating systems
Patent #: 5786764
Issued on: 07/28/1998
Inventor: Engellenner
Data processing system and method for accessing a plurality of radio frequency identification tags
Patent #: 5822714
Issued on: 10/13/1998
Inventor: Cato
Data communication and electronic article surveillance tag
Patent #: 5859587
Issued on: 01/12/1999
Inventor: Alicot, et al.
Method for repeating interrogations until failing to receive unintelligible responses to identify plurality of transponders by an interrogator
Patent #: 5929801
Issued on: 07/27/1999
Inventor: Aslanidis, et al.
Method and apparatus for locating and tracking documents and other objects
Patent #: 5936527
Issued on: 08/10/1999
Inventor: Isaacman, et al.
Combination radio frequency transponder (RF Tag) and magnetic electronic article surveillance (EAS) material
Patent #: 5939984
Issued on: 08/17/1999
Inventor: Brady, et al.
Inventory system using articles with RFID tags
Patent #: 5963134
Issued on: 10/05/1999
Inventor: Bowers, et al.
Electronic identification system confirming valid code
Patent #: 5995017
Issued on: 11/30/1999
Inventor: Marsh, et al.
Integrated multi-meter and wireless communication link
Patent #: 6078251
Issued on: 06/20/2000
Inventor: Landt, et al.
Method and apparatus for locating and tracking documents and other objects Patent #: 6127928
Issued on: 10/03/2000
Inventor: Issacman, et al.
August 5, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
