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Method and apparatus for detecting unauthorized intrusion into a container

  • US 7,259,669 B2
  • Filed: 04/15/2004
  • Issued: 08/21/2007
  • Est. Priority Date: 04/18/2003
  • Status: Active Grant
First Claim
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1. A method comprising:

  • emitting a wireless signal within a container;

    detecting said wireless signal in the region of and externally of said container;

    monitoring said detected wireless signal for a change in a characteristic thereof caused by a circumstance other than a change in said wireless signal as transmitted; and

    responding to detection of a change in said characteristic of said detected wireless signal by transmitting a wireless notification of the occurrence of the change to a location remote from said container.

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