1
Leonard C Vercellotti, Alan F Mandel, Richard J Ravas, John C Schlotterer, James A Neuner: Dual mode electronic identification system. Westinghouse Electric, G R Jarosik, May 31, 1994: US05317309 (238 worldwide citation)

A dual mode electronic identification system using a tag which has a RF receiver and transmitter contained therein. In the first mode the tag responds to an interrogation signal by transmitting identification data to the interrogator. In the second mode the tag periodically transmits an identificati ...


2
Michael L Beigel, Nathaniel Polish, Robert E Malm: Multi-mode identification system. Avid Corporation, Robert E Malm, August 10, 1993: US05235326 (196 worldwide citation)

The multi-mode identification system is a short-range cooperative electronic identification system for use in the identification of fish, birds, animals, and inanimate objects. The system consists of readers and tags wherein a reader in the proximity of and inductively coupled to a tag may interroga ...


3
Michael J C Marsh, Andrzej Lenarcik: Electronic identification system. British Technology Group, Lowe Price Leblanc & Becker, July 16, 1996: US05537105 (195 worldwide citation)

An identification system comprises an interrogator and a number of transponders. The interrogator includes a transmitter for transmitting an interrogation signal to the transponder, and a receiver for receiving a response signal from the transponder. A micro-processor identifies the transponder from ...


4
John P Hanton, Harley A Leach: Electronic livestock identification system. Cooper Dunham Clark Griffin & Moran, April 21, 1981: US04262632 (177 worldwide citation)

An electronic identification system for livestock, particularly adapted to tagging ruminating animals, such as cattle and sheep, comprising a transmitter capsule which is implantable in the animal and precoded to broadcast a series of binary coded electric pulses peculiar to the animal. An associate ...


5
Christopher Hook, Keith Juson, Chris Hall, Donald Harold Ferguson, Dimitrie Octavian Paun, Alexandru Oprea: Passive transponder. Kasten Chase Applied Research, Fay Sharpe Beall Fagan Minnich & McKee, October 21, 1997: US05680459 (131 worldwide citation)

The present invention relates to an electronic identification system comprising one or more transponders which store identification and other information in memory, and readers, which capture information from the transponders and write new information thereto, and in which communications between tra ...


6
Charles A Walton: Electronic identification system with power input-output interlock and increased capabilities. Gerald L Moore, September 25, 1984: US04473825 (115 worldwide citation)

A portable electronic identification system comprised of an identifier preferably of credit card size, and a fixed position reader which couples to it over short distances by space transmitted signals. The identifier card is energized from and the resulting signals are synchronized and detected by t ...


7
Michael J C Marsh, Clinton A Van Zyl: Synchronized electronic identification system. British Technology Group, Lowe Price LeBlanc & Becker, September 17, 1996: US05557280 (110 worldwide citation)

The invention relates to an identification system comprising an interrogator and a plurality of transponders. The interrogator includes transmitter means for transmitting an interrogation signal to the transponder, receiver means for receiving a response signal from the transponder, and processor me ...


8
Klensch Richard Joseph: Electronic identification system. RCA Corporation, Norton Edward J, Lazar Joseph D, Lechter Michael A, October 21, 1975: US3914762 (100 worldwide citation)

An electronic detection and identification system operating with correlated microwave frequencies wherein a transmitter continuously transmits a beam of electromagnetic energy, in a predetermined direction, so as to impinge on an identification tag suitably attached on a passing object. The identifi ...


9
Howard A Baldwin, Conrad M B Walker, William K Brockelsby: Electronic identification system. EID Electronic Identification Systems, Fitch Even Tabin & Flannery, September 26, 1989: US04870419 (93 worldwide citation)

An identification system to identify objects from a remote interrogation station may be used with moving objects such as railroad cars. The system remotely programs and stores information on an object and remotely retrieves information from the object. An information and identity storage device is l ...


10
Christopher D Hook, Christopher S Hall: Transponder system with variable frequency transmission. Disys Corporation, Lee Mann Smith McWilliams Sweeney & Ohlson, September 12, 1995: US05450492 (93 worldwide citation)

An electronic identification system comprising a transmitter for generating an electromagnetic excitation signal, one or more portable transponders for storing variable identification data, and for transmitting an information signal containing the identification data upon entering the field. Transmi ...