Patent ID: 8884764

Claim:
A tamper indicating RFID label, comprising: an RFID chip having at least a first terminal and a second terminal; at least one antenna coupled to the RFID chip; and a conductive material forming a loop coupled to the RFID chip that influences a response signal sent from the RFID label when it is read such that when the conductive loop changes from a closed path to an open path one or more digital bits are altered, and wherein the conductive loop is configured such that, a first end of the conductive loop is coupled to the first terminal of the RFID chip, a second end of the conductive loop is coupled to the second terminal of the RFID chip, and portions of the conductive loop near the first end of the conductive loop and the second end of the conductive loop are configured such that, between the portions, there is non-straight line access from an area outside the RFID label to a gap between the first terminal and the second terminal of the RFID chip.