Navigation system for cars

  • US 5,353,023 A
  • Filed: 06/25/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 06/27/1991
  • Status: Expired due to Term
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First Claim
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1. A car navigation system, comprising:

  • car location estimating means for estimating a traveling location of a car based in part on road network maps and generating car information;

    car accident detecting means for detecting occurrence of an accident involving the car;

    storage means for successively storing and updating the car information from the car location estimating means, the car information including car location based on road network maps and emergency telephone numbers and emergency radio frequencies based on the car location for communicating the accident to nearby emergency rescue stations, said storage means being operable to stop updating the car information when the car accident detecting means detects the occurrence of the accident; and

    communication means for transmitting the car information and the emergency numbers and frequencies obtained from the car location estimating means and the updated car information from said storage means via an optimal transmissionwhen said car accident detecting means detects the occurrence of the accident.

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