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System and method for locating objects including an inhibiting feature

  • US 5,731,785 A
  • Filed: 05/13/1994
  • Issued: 03/24/1998
  • Est. Priority Date: 05/13/1994
  • Status: Expired due to Term
First Claim
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1. A method for locating one of a plurality of identifiable, moveable objects on the surface of the earth comprising:

  • (a) receiving location-indicating information signals from a plurality of earth satellites at a portable receiver coupled to a moveable object;

    (b) calculating the location of said object using said location-indicating signals;

    (c) transmitting a remotely generated inquiry signal particularly identifying the object;

    (d) when the receiver of the object receives the inquiry signal, transmitting from said receiver to a monitor station signals indicating the calculated location of the object; and

    (e) employing said transmitted signals to intelligibly indicate at the monitor station the location of said object;

    (f) wherein the transmission of calculated location signals from the object is inhibited for a time by entering an inhibiting personal identification number at the object.

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