Patent ID: 8681005

Claim:
A digital sign comprising: a first Radio Frequency Identification (RFID) reader; a wireless communication transceiver operable on a local area network; a motion detector; and a processor coupled to the motion detector, the wireless communication transceiver, and the first RFID reader, the processor operable to trigger the first RFID reader to read any RFID tags in proximity to the first RFID reader in response to the motion detector detecting a motion in proximity to the first RFID reader, wherein the first RFID reader is part of the local area network that includes other RFID readers surrounding the first RFID reader, and wherein the processor is operable to direct the transceiver to communicate with those other RFID readers in the local area network in order to trigger those other RFID readers to read any RFID tags in proximity to those other RFID readers following motion being detected in proximity to the first RFID reader to detect whether a tag previously read near the first RFID reader can subsequently be read by one of those other RFID readers, whereupon a network controller in communication with the one of those other RFID readers will remove an item associated with that RFID tag from an inventory at a location of the first RFID reader.