In general, in one aspect, the invention features a system and method for communicating with a RFID tag. The method includes receiving a signal from a RFID tag, and identifying the tag type from the RFID tag signal. In another aspect, the invention features a system and method for communicating tag receiver...http://www.google.es/patents/US6400272?utm_source=gb-gplus-sharePatente US6400272 - Wireless transceiver for communicating with tags
