Security and tracking system

  • US 6,606,556 B2
  • Filed: 10/31/2002
  • Issued: 08/12/2003
  • Est. Priority Date: 03/31/1999
  • Status: Expired due to Term
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First Claim
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1. A security and tracking apparatus comprising:

  • (a) a first signaling unit having means for identifying the location of said first signaling unit;

    (b) a second signaling unit in communicating proximity with the first signaling unit, said second signaling unit having means for identifying the location of said second signaling unit; and

    , (c) means for transmitting the location of said signaling units when the first and second signaling units are separated by more than a preselected distance.

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