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Key control system using separated ID and location detection mechanisms

  • US 7,049,961 B2
  • Filed: 08/23/2004
  • Issued: 05/23/2006
  • Est. Priority Date: 04/26/2001
  • Status: Expired due to Term
First Claim
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1. A method for tracking the replacement and removal of objects from a receptacle, said method comprising the steps of:

  • conducting a scan of a plurality of slots in a receptacle to determine the presence of an object in the slot;

    conducting a scan of said receptacle to identify objects within the receptacle;

    comparing the results of the slot scan with the results from a previous slot scan; and

    comparing the results of the receptacle scan with the results from a previous receptacle scan.

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