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Vehicle anti-theft system using second key means

  • US 5,079,435 A
  • Filed: 12/14/1989
  • Issued: 01/07/1992
  • Est. Priority Date: 12/20/1988
  • Status: Expired due to Term
First Claim
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1. A vehicle anti-theft system, comprising first mechanical key means including a first key switch which is adapted to be operated by a first mechanical key, first electronic key means including a signal receiver which is adapted to be operated by a first electronic key;

  • and a control unit for allowing a motor vehicle to be operated when both said first mechanical key means and said first electronic key means are operated by said first mechanical key and said first electronic key, respectively, further comprising;

    second key means which is adapted to be operated by a second key, said control unit allowing said motor vehicle to be operated even when said first electronic key has become unable to function normally only if said first mechanical key means is operated by said first mechanical key and said second key means is operated by said second key.

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