| US 7,489,246 B2 | ||
| System and method to record environmental condition on an RFID tag | ||
| Kevin David Himberger, Durham, N.C. (US); Clark Debs Jeffries, Chapel Hill, N.C. (US); and Mohammad Peyravian, Cary, N.C. (US) | ||
| Assigned to International Business Machines Corporation, Armonk, N.Y. (US) | ||
| Filed on Jun. 22, 2007, as Appl. No. 11/766,883. | ||
| Application 11/766883 is a continuation of application No. 11/132535, filed on May 19, 2005, granted, now 7,327,260. | ||
| Prior Publication US 2007/0241905 A1, Oct. 18, 2007 | ||
| Int. Cl. G08B 13/14 (2006.01) | ||
| U.S. Cl. 340—572.1 [340/572.8; 340/870.17; 340/584; 340/588; 340/601; 235/440] | 17 Claims |
| 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.
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