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Door approach communication apparatus and door lock control apparatus

  • US 6,304,168 B1
  • Filed: 04/21/1998
  • Issued: 10/16/2001
  • Est. Priority Date: 04/21/1997
  • Status: Expired due to Term
First Claim
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1. A door approach communication apparatus, comprising:

  • an outside door handle functioning as a slot antenna, at least the surface of the outside door handle being made of a conductor, the outside door handle including a slit opening in the surface and feeding points; and

    at least one of;

    a transmitter for applying a radio wave to the feeding points; and

    a receiver connected to the feeding points for receiving radio waves.

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