Patent ID: 7489246
Filing Date: 2009-02-10
Classification: G06K

Abstract:
1. A method of recording temperature on RFID tags, the method comprising: attaching a first RFID tag to a container, the first RFID tag including a temperature sensor, the container containing a plurality of packages, each of a plurality of second RFID tags attached to a respective one of the plurality of packages; responsive to the first RFID tag transmitting temperature information to the plurality of second RFID tags, the plurality of second RFID tags recording the temperature information; storing in the plurality of a second RFID tags an identity of the first RFID tag; the first RFID tag also transmitting to the plurality of second RFID tags the identity of the first RFID tag; the plurality of second RFID tags comparing the identity transmitted by the first RFID tag to the identity of the first RFID tag stored in the plurality of second RFID tags; if the identity transmitted by the first RFID tag matches the identity of the first RFID tag stored in the plurality of second RFID tags, the plurality of second RFID tags recording the temperature information, and if the identity transmitted by the first RFID tag does not match the identity of the first RFID tag stored in the plurality of second RFID tags, the plurality of second RFID tags not recording the temperature information.