Patent ID: 8198987

Claim:
A radio tag reading device having an antenna and designed to perform radio communication with radio tags existing in communication areas where radio signals transmitted from the antenna can travel, thereby to read identification data specific to each radio tag and stored in the tag, the device comprising: a target tag storage unit configured to store the tag data items of the radio tags existing in a target section holding the radio tags from which to read data; a non-target tag storage unit configured to store at least the identification data specific to any radio tag that exists in non-target sections surrounding the target section holding the radio tags from which to read data; a control unit configured to perform a non-target tag process of storing, in the non-target tag storage unit, at least the identification data included in the tag data read from the radio tag via the antenna, and a target tag process of storing, in the target tag storage unit, all tag data read from the radio tags via the antenna, except the tag data stored in the non-target tag storage unit containing the identification data stored in the non-target tag storage unit; and an output unit configured to output the tag data stored in the target tag storage unit.