05489908 is referenced by 174 patents and cites 6 patents.

Apparatus and method for identifying a plurality of transponders (10-16) located within an inquiry field (18) of an interrogation unit (20) are provided. Each transponder (10-16) is assigned an unique identification code, and the interrogation unit (20) dynamically constructs and modifies a bit string used to solicit responses from selected transponder(s) until each transponder (10-16) in the inquiry field (18) is identified. The bit string is transmitted to the transponders, which compares it with the least significant bits of their respective identification codes. A mismatch between the identification code and the bit string results in suppressing the response from the transponder.

Title
Apparatus and method for identifying multiple transponders
Application Number
8/282095
Publication Number
5489908
Application Date
July 27, 1994
Publication Date
February 6, 1996
Inventor
Andreas Hagl
Dachau
DE
Kurt Orthmann
Munich
DE
Agent
Rene E Grossman
Richard L Donaldson
James C Kesterson
Assignee
Texas Instruments Deutschland
DE
IPC
G01S 13/75
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