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Method and apparatus for encoding paper with information

  • US 20040131225A1
  • Filed: 08/14/2003
  • Published: 07/08/2004
  • Est. Priority Date: 11/10/1999
  • Status: Active Grant
First Claim
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1. A paper-making method including:

  • defining a two-dimensional signal that encodes plural bits of data;

    defining a frequency-domain signal;

    inverse transforming the frequency-domain signal to yield a pattern in the spatial domain; and

    shaping an element of the paper-making apparatus in accordance with said spatial domain pattern; and

    shaping the element of a paper-making apparatus in accordance with a pattern corresponding to said signal.

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