Electromagnetic identification system
Sensory and control system for local area networks
Multibit tag with stepwise variable frequencies
Object locator system and methods therefor
Detection of multiple articles
Communicating with electronic tags
Power and modulation circuit for a remotely-pollable electronic tag
Object identification system
Method and apparatus for radiofrequency identification tags Patent #: 5856788
ApplicationNo. 150882 filed on 09/10/1998
US Classes:340/572.1, Detectable device on protected article (e.g., "tag")340/10.42, Identification only340/572.4Specified processing arrangement for detected signal
ExaminersPrimary: Hofsass, Jeffery
Assistant: Pham, T.
Foreign Patent References
International ClassG08B 013/14
AbstractAn electronic tag has a processor, a readable memory for holding an identification number connected to the processor, and an antenna connected to the processor for radiofrequency broadcasting of the identification number. A power supply powers the antenna to broadcast the identification number.A user selectively controls operation or non-operation of the electronic tag by switching an interconnect switch on or off. The interconnect switch permits interconnects the processor, readable memory, antenna, and power supply to selectively allow radiofrequency broadcasting of the identification number. Bitwise communication to a tag reader using only a passive electronic tag is possible.