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Radio frequency identification system write broadcast capability

  • US 6,919,793 B2
  • Filed: 08/24/1999
  • Issued: 07/19/2005
  • Est. Priority Date: 09/09/1994
  • Status: Expired due to Fees
First Claim
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1. A radio frequency tag comprising:

  • a tag antenna for receiving a radio frequency signal from a base station, the radio frequency signal having sent data;

    a tag memory having a tag data location with old data;

    a tag logic having an active state and an initialize state, a Select Command placing the tag in the active state if the tag meets a select condition and an Unselect Command placing the tag in the initialize state if the tag meets an unselect condition;

    a tag receiver for receiving the radio frequency signal from the tag antenna, the tag writing the sent data to the tag data location if the tag is in the active state and the tag not writing the sent data to the tag data location if the tag is in the initialize state.

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