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Position-coding pattern

  • US 7,623,713 B2
  • Filed: 09/04/2008
  • Issued: 11/24/2009
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. A product comprising:

  • a base;

    a first position code provided to define locations of a plurality of first points, said first position code allowing a sensing device to determine positions from a surface of the base;

    a user-identifiable field provided on the base, the field being associated with a predetermined function to be performed in consequence of the sensing device being placed in the field;

    at least one zone including said field; and

    a second position code provided to define locations for a plurality of second points, said second position code allowing a user unit to determine positions from within said at least one zone.

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