×

Telephone operable global tracking system for vehicles

  • US 5,918,180 A
  • Filed: 12/22/1995
  • Issued: 06/29/1999
  • Est. Priority Date: 12/22/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A global tracking system (GTS) for monitoring an alarm condition associated with and locating a movable object, the GTS comprising:

  • a cellular telephone located with the movable object;

    a GPS (global positioning system) receiver located with the movable object, the GPS receiver being effective for providing data reflecting a present spacial position of the movable object, in terms of spacial latitude/longitude coordinates;

    an interface between the GPS receiver and the cellular telephone, the interface being connected between the GPS receiver and the cellular telephone and including circuitry for transmitting the spacial coordinates from the GPS receiver through the telephone, wirelessly to a remote location; and

    an alarm for detecting that the object has been moved, by calculating a spatial movement of the object which exceeds a predetermined distance based on information supplied by the GPS receiver, and the alarm initiating the transmission to the remote location the spatial coordinates from the GPS receiver when said movement of predetermined distance has been detected.

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