RF transponder identification system and protocol
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United States of America Patent
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Mar 25, 2003
Grant Date -
N/A
app pub date -
Jan 5, 1999
filing date -
Mar 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An RF transponder identification system with an interrogator operable to transmit a plurality of marker signals and a plurality of transponder. Each transponder has a random number associated therewith, a counter counting the number of marker signals received from the interrogator and transmission means to transmit an identification code when the number of marker signals received by the transponder equals the random number associated with the transponder.
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