Patent ID: 7973646

Claim:
A method for inspecting radio frequency identification (RFID) tags, comprising steps of: (a) reading a plurality of RFID tags in a readable zone; and (b) determining whether there is any malfunctional RFID tag in the plurality of RFID tags, and determining where the malfunctional RFID tag is located using a way of shielding if there is any malfunctional RFID tag; wherein the way of shielding further comprises steps of: (b1) shielding one of the RFID to s in the readable zone; (b2) reading the RFID tags in the readable zone and determining whether the number of readable RFID tags in the readable zone is reduced; (b3) determining that the shielded RFID to is functional if the number of readable RFID tags in the readable zone is reduced and determining that the shielded RFID tag is malfunctional if the number of readable RFID tags in the readable zone is not reduced; and (b4) shielding a next one of the RFID tags and going to step (b2) until all the malfunctional RFID tags are found.