Retrofittable apparatus for converting a substantially planar surface into an electronic data capture device

  • US 6,501,461 B2
  • Filed: 03/24/1999
  • Issued: 12/31/2002
  • Est. Priority Date: 02/21/1997
  • Status: Expired due to Term
First Claim
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1. A retrofittable apparatus for converting a substantially planar surface into a writing surface for an electronic data capture device, the apparatus comprising:

  • a unitary sensor array that securely and rigidly fixes a relation between a plurality of sensors and that provides a tracking function to determine the position of a marking implement on the writing surface; and

    a means for affixing the unitary sensor array to the substantially planar surface.

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