Systems for Remotely Maintaining Inventory
2 Assignments
0 Petitions
Accused Products
Abstract
A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.
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Citations
18 Claims
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1. (canceled)
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2. A system for remotely maintaining an inventory, comprising:
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providing at each entry point to a predetermined area a radio frequency signal interrogator operable for transceiving spread spectrum radio frequency signals;
transporting one or more articles into the predetermined area, the articles each having an RFID tag associated with them, each of the RFID tags comprising a substrate with one or more antennas disposed thereon, a monolithic radio frequency transceiver integrated circuit coupled to the one or more antennas disposed adjacent the substrate and comprising a receiver for receiving spread spectrum radio frequency signals, a transmitter for communicating spread spectrum radio frequency signals, a controller, a memory for the persistent storage of identification data associated with the article, and a random number generator, and a battery coupled to supply power to the monolithic radio frequency transceiver integrated circuit;
transmitting from the radio frequency signal interrogator a command to the RFID tags to respond by transmitting data identifying the article stored within the memory within the RFID tag as articles pass in remote proximity to the interrogators to enter the predetermined area;
receiving in the radio frequency signal interrogator a spread spectrum radio frequency signal from the RFID tags including the data identifying the article; and
storing a count of the articles identified by the interrogator as entering the predetermined area. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification