Anti-theft device for protecting electronic equipment

  • US 5,530,431 A
  • Filed: 04/11/1995
  • Issued: 06/25/1996
  • Est. Priority Date: 04/11/1995
  • Status: Expired due to Term
First Claim
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1. Method of protecting portable electronic equipment against unauthorized power-up, said electronic equipment deriving its power from household-type wiring and having a power supply component, comprising:

  • providing the power supply component of the electronic equipment with a decoder, said decoder permitting powering-up the electronic equipment only upon receipt of an externally-generated unique code; and

    connecting an encoder-emitter to the household-type wiring for transmitting the unique code to the decoder;


    the decoder permits repeated powering-up of the electronic equipment so long as the decoder remains connected to the household-type wiring; and

    the decoder prohibits subsequent powering-up of the electronic equipment in the event that the household-type wiring discontinues to deliver power to the electronic equipment or in the event that the decoder is disconnected from the household-type wiring.

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