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Proximity detection system and method

  • US 7,012,187 B2
  • Filed: 03/02/2005
  • Issued: 03/14/2006
  • Est. Priority Date: 09/26/2000
  • Status: Expired due to Term
First Claim
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1. A proximity contacting instrument, comprising:

  • a substrate;

    a first conductive mesh coupled to the substrate;

    a first switch coupled to the substrate, the first switch having a first state and a second state, the first switch for switching from the first state to the second state anda first tone generator coupled to the first switch and to the first conductive mesh for generating a first tone on the first conductive mesh when the first switch switches to the second state.

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