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United States of America Patent
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Issued Date -
Dec 16, 2010
app pub date -
Jan 22, 2010
filing date -
Jun 16, 2009
priority date (Note) -
Abandoned
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Abstract
A computer-based method includes providing multiple substantially similar documents, generating a series of unique identification codes and printing an identification marking that corresponds to one of the identification codes for each of the documents. Each of the printed identification markings includes at least a first portion printed with a first ink to produce a first visual effect and a second portion printed with a second ink that produces a second visual effect different than the first visual effect.
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