Reversibly activating or deactivating a radio frequency identification (RFID) data tag comprising a circuit responsive to an environmental factor. An RFID tag includes an RFID chip for storing an RFID code, an antenna for communicating a radio frequency (RF) signal, and an environmentally sensitive ...http://www.google.es/patents/US7948381?utm_source=gb-gplus-sharePatente US7948381 - Reversibly deactivating a radio frequency identification data tag
Reversibly deactivating a radio frequency identification data tag
