Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 24, 2009
Patent Application Number
11112718
Date Filed
April 22, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A perishable integrity indicator system includes a RFID transponder and a perishable integrity sensor. The RFID transponder includes a RF integrated circuit coupled with an antenna. The sensor monitors the time and temperature of the perishable. A freshness determining module receives time- and temperature-dependent measurement data from the perishable integrity sensor and determines a current freshness status. A communications interface to the RFID transponder permits a RFID reader to retrieve current freshness status data corresponding to the freshness status determined by the freshness determining module. The system further includes a power management module.
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