Patent ID: 7616094

Claim:
A radio frequency tag having an associated object, said radio frequency tag comprising: (a) a tag antenna for receiving a radio frequency write broadcast signal, not directed to any particular tag, from a base station, the radio frequency write broadcast signal having sent data unrelated to tag identification, and not being directed to any particular tag; (b) a tag memory having a tag data location; (c) a tag logic having a selected state and a non-selected state; (d) the tag being responsive to one or more group selection commands to place the tag in the selected state if the tag meets one or more selection conditions, the one or more group selection commands not being directed to any particular tag; and the one or more selection conditions requiring the tag to have information in said tag memory related to the object with which the tag is associated, such information not being related to the tag identification; (e) a tag receiver for receiving the radio frequency write broadcast signal from the tag antenna; (f) the tag writing the sent data unrelated to tag identification, and not being directed to any particular tag, to the tag data location if the tag is in the selected state, so that the sent data is thereafter available for reading in response to a read command addressed to the transponder data location, and the tag not writing the sent data to the tag data location if the tag is in the non-selected state; (g) the tag having said information in said tag memory related to the object with which the tag is associated and not being related to tag identification so that the tag is placed in said selected state in response to said one or more group selection commands.