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Including contextual information with a formed expression

  • US 7,826,687 B2
  • Filed: 11/20/2006
  • Issued: 11/02/2010
  • Est. Priority Date: 03/18/2005
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a writing element having a first portion operable to discharge a first marking substance on a surface in response to a movement of the writing element over the surface and a second portion operable to discharge a second marking substance on the surface, the second mark being a binary mark encoding information that is not included in the discharge of the first marking substance, the binary mark following a contour of the movement of the writing element over the surface and in response to a controller; and

    the controller operable to encode information corresponding to a context of the apparatus by regulating the discharge of the second marking substance.

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