Security mark with copyable and non-copyable elements
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United States of America Patent
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Mar 8, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 25, 2014
filing date -
Feb 25, 2014
priority date (Note) -
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Abstract
A document contains a security element that combines a correlation mark and microgloss mark so that foreground pixels of the correlation mark are printed in a toner of a first color, and pixels of the correlation mark overwrite portions of the correlation mark in a second color, but neither the first color nor the second color appear on areas that correspond to background pixels of the correlation mark.
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