Patent ID: 7595730

Claim:
A state recognition tag comprising: a tag main body recognizable by a tag reader/writer; a tag fragment separable from the tag main body and recognizable by the tag reader/writer; a tag-main-body information holding unit that is provided in the tag main body, for storing information to be transmitted to the tag reader/writer for recognizing the tag main body; a tag-fragment information holding unit that is provided in the tag fragment, for storing information to be transmitted to the tag reader/writer for recognizing the tag fragment; a tag-main-body separation-state recognizing unit that is provided in the tag main body, for recognizing a separation state of the tag main body and the tag fragment; a tag-fragment separation-state recognizing unit that is provided in the tag fragment, for recognizing the separation state of the tag main body and the tag fragment; a tag-main-body control unit that is provided in the tag main body, for determining whether the tag main body is separated from or connected with the tag fragment based on the separation state recognized by the tag-main-body separation-state recognizing unit, and depending upon a request received from the tag reader/writer, transmitting the separation state recognized by the tag-main-body separation-state recognizing unit to the tag reader/writer or overwriting the information in the tag-main-body information holding unit with information received from the tag reader/writer; a tag-fragment control unit that is provided in the tag fragment, for determining whether the tag main body is separated from or connected with the tag fragment based on the separation state recognized by the tag-fragment separation-state recognizing unit, and depending upon a request received from the tag reader/writer, transmitting the separation state recognized by the tag-fragment separation-state recognizing unit to the tag reader/writer or overwriting the information in the tag-fragment information holding unit with information received from the tag reader/writer; a tag-main-body electric power supplying unit that is provided in the tag main body, for supplying electric power to the tag-main-body information holding unit, the tag-main-body separation-state recognizing unit, and the tag-main-body control unit; and a tag-fragment electric power supplying unit that is provided in the tag fragment, for supplying electric power to the tag-fragment information holding unit, the tag-fragment separation-state recognizing unit, and the tag-fragment control unit.