Patent ID: 8421627

Claim:
A method of determining an identity of one or more radio-frequency identification (RFID) tags of a plurality of RFID tags within a region, the method comprising: transmitting an interrogation signal with an RFID reader corresponding to a read zone having a first size; receiving a response from a first RFID tag of the plurality of RFID tags located within the read zone; recording an indicator of the response for the first RFID tag that designates the first RFID tag as a first recorded tag; increasing the size of the read zone to a second size within the region; receiving a second response from a second RFID tag of the plurality of RFID tags if the second RFID tag is located within the read zone having the second size; recording a second indicator of the second response for the second RFID tag that designates the second RFID tag as a second recorded tag if the second response is received from the second RFID tag; and associating the first recorded tag with the region; and associating the second recorded tag with the region if the second indicator designates the second RFID tag as the second recorded tag.