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Automobile burglary detecting circuit

  • US 4,777,468 A
  • Filed: 09/26/1986
  • Issued: 10/11/1988
  • Est. Priority Date: 09/26/1986
  • Status: Expired due to Fees
First Claim
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1. An automobile burglary detecting circuit for use with an automobile electrical system having an automobile electrical accessory activated by a switch, comprising:

  • signal generating means coupled to said electrical system for imposing an oscillating signal on said system;

    signal detecting means for detecting said signal;

    alarm oscillator means coupled to said signal detecting means for imposing an alarm oscillating signal onto said electrical system; and

    alarm filter means for detecting said alarm oscillating signal and activating an alarm.

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