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Enhanced identification system

  • US 8,872,631 B2
  • Filed: 08/10/2012
  • Issued: 10/28/2014
  • Est. Priority Date: 05/14/1997
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • a reader; and

    a plurality of transponders;

    wherein the reader is configured to transmit a powering signal to the plurality of transponders,wherein each of the transponders is configured to become an active transponder subsequent to receiving the powering signal and transmit identifying data after executing a random wait cycle,wherein the reader is further configured to transmit a mute instruction muting all transponders except for a controlling transponder, wherein the muting instruction causes an active transponder to halt a random wait cycle until restarted,wherein a coded instruction is included in the mute instruction,wherein the controlling transponder is configured to perform an operation in accordance with the coded instruction, andwherein the mute instruction comprises a modulation of the powering signal while the powering signal maintains a pre-selected frequency, the mute instruction being transmitted during a transmission by the controlling transponder.

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