×

Proximity management system and method using radio-frequency identification tags

  • US 7,274,292 B2
  • Filed: 06/25/2004
  • Issued: 09/25/2007
  • Est. Priority Date: 06/25/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for managing items comprising:

  • a master controller; and

    a plurality of radio-frequency identification (RFID) tags, wherein each tag is associated with one of a plurality of managed items,wherein the master controller determines the proximity of the managed items within communication range based on signal levels of response signals generated by the RFID tags in response to interrogation signals and provides a notification when certain ones of the items are within a proximity threshold, the proximity threshold being less than the communication range, andwherein the master controller has access to a storage location which includes a database, the database comprising unique identification codes of the RFID tags, a description of the associated items, and a proximity threshold associated with each item.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×