Vehicle tracking and security system

  • US 5,223,844 A
  • Filed: 04/17/1992
  • Issued: 06/29/1993
  • Est. Priority Date: 04/17/1992
  • Status: Expired due to Term
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First Claim
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1. A mobile unit for a vehicle monitoring system, the mobile unit comprising:

  • a) an input unit, responsive to an event or condition associated with the vehicle, and providing information describing the event or condition;

    b) a satellite receiver, responsive to navigation signals transmitted by a satellite navigation system, and providing information inherently describing the vehicle'"'"'s location based on the navigation signals; and

    c) a mobile unit controller, responsive to the input unit and the satellite receiver, the mobile unit controller including a cellular telephone transmitter for transmitting information onto a cellular telephone communications link, the information transmitted on the cellular telephone communications link including both (1) the information describing the event or condition and (2) the information inherently describing the vehicle'"'"'s location, the mobile unit controller automatically inserting the information describing the vehicle'"'"'s location into the information transmitted onto the cellular telephone communications link.

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