Conditional RFID

• US 8,994,533 B2
• Filed: 11/30/2007
• Issued: 03/31/2015
• Est. Priority Date: 11/30/2006
• Status: Active Grant

• Current Assignee: TurboPatent Corp.
• Original Assignee: TurboPatent Corp.
• Inventors: Billmaier, James A., Kellum, John M., Billmaier, David P.
• Primary Examiner(s): GIRMA, FEKADESELASS
• Application Number:
  US11/998,874
• Publication Number:
  US 20080197983A1
• Time in Patent Office: 2,678 Days
• Field of Search: 340/572.1, 340/10.1, 340/505, 340/539.17, 340/22
• US Class Current: 340/572.1
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders

Abstract

A RFID tag includes an RF transceiver; logic to operate the RF transceiver to respond to a received signal with a unique radio frequency id; logic to compare information in the received signal with conditional response criteria; and logic to determine if data has been received and written into a writable memory area by the RFID tag, and to respond to the received signal only if the data has been received and stored in the writable memory area and matches the conditional response criteria.

Claims

1. An RFID tag comprising:

an RF transceiver configured to receive and respond to a first signal from an RFID reader device;

logic to operate the RF transceiver to respond to a second received signal from the RFID reader device with a unique radio frequency id;

logic to associate the second received signal with the first received signal, the first and second received signals each received by the RFID tag from the RFID reader device, and logic to conditionally respond to the second received signal only if the second received signal is determined to be associated with the first received signal;

logic to associate the first and second received signals based upon an extent of a time interval between the first and second received signals and to conditionally respond to the second received signal based on the association established from the time interval.

2. The RFID tag of claim 1 comprising logic to associate the first and second received signals based upon a closeness of location of origin of the first and second received signals, and to conditionally respond to the second received signal based upon the closeness of the location of origin of the first and second received signals.