Transponder arrangement
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United States of America Patent
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Sep 19, 1995
Issued Date -
N/A
app pub date -
Jun 22, 1994
filing date -
Jul 8, 1988
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A transponder system comprises an interrogation unit for communicating with a plurality of responder units. At least one responder unit receives an interrogation signal from the interrogation unit and returns data as signal information to the interrogation unit in response to the reception of the interrogation signal. The responder unit also includes sensor circuitry sensitive to predetermined physical parameters in the environmental area of the responder unit and, via a data processor, generates data representative of the physical parameter and sends it back to the interrogator as signal information.
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