RFID tag having timing and environment modules
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United States of America Patent
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-
Sep 25, 2001
Grant Date -
N/A
app pub date -
Oct 4, 1999
filing date -
Oct 4, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An RFID tag is provided with a timing module to measure elapsed time and an environment module to detect certain environmental conditions. The RFID tag includes a transmitter/receiver, memory module, antenna module, converter, and the timing and environment modules. In an embodiment of the invention, the timing module enables the user, upon interrogating the RFID tag, to determine the precise length of time from the previous charge of the RFID tag. The environment module enables the user to determine how long the RFID tag has been exposed to certain environmental conditions that have been pre-defined by the user.
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