Method of inventorying transponders by means of a...

Details Method of inventorying transponders by means of a... Method of inventorying transponders by means of a...

2003-08-05

2010-11-16

Zimmerman, Brian A (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010100, C340S005920, C340S572100

Reexamination Certificate

active

07834742

ABSTRACT:
In a method of inventorying a plurality of transponders (2) by means of a communication station (1) communicating with the transponders (2) in contactless manner, the communication station (1) emits an unmodulated carrier signal (NMCS) in a communications range of the communication station (1) and each transponder (2) on entering the communications range then emits a presence-signaling signal (PRES) and the communication station (1) on receiving a presence-signaling signal (PRES) then emits an inventorying command signal (INVS) and each transponder (2) on receiving the inventorying command signal (INVS) then emits a response signal (RESPS) permitting inventorying of the transponder (2) and the communication station (1) on correctly receiving a response signal (RESPS) then undertakes inventorying of the relevant transponder (2).

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