Patent ID: 8154408

Claim:
A method for determining when a set of RFID tags on a set of stacked objects belongs to a same defined subset of stacked objects, and for determining a location of the defined subset, comprising: receiving signals from the set of RFID tags on the set of stacked objects, said RFID tags comprising integrated devices capable of sending signals that can be received by a receptor device and interpreted to determine a motion state of each RFID tag and object; interpreting said signals to determine that a subset of the stacked objects belong to the same defined subset based on the motion state of each RFID tag and object within the defined subset, wherein said signals indicate whether the motion state of each RFID tag and object are in a same motion state within a predetermined time of each other; and determining a location of all the objects in the defined subset of objects by determining a location of as few as one RFID tag in the defined subset of objects.