Systems and methods for inventory round slot classification are described. The method includes transmitting, to zero or more RFID tags, a message during a slot of an inventory round and receiving a response from at least some of the zero or more RFID tags. The method also includes analyzing a received...http://www.google.co.uk/patents/US8022814?utm_source=gb-gplus-sharePatent US8022814 - Systems and methods for slot classification