06294997 is referenced by 268 patents and cites 13 patents.

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.

Title
RFID tag having timing and environment modules
Application Number
9/412091
Publication Number
6294997 (B1)
Application Date
October 4, 1999
Publication Date
September 25, 2001
Inventor
Paul A Maltseff
Edmonds
WA, US
Robert M Paratore
Woodinville
WA, US
Agent
O&apos Melveny & Myers
US
Assignee
Intermec Ip
CA, US
IPC
G08B 13/14
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