Sheet material comprising at least one watermark having a colored shade
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United States of America Patent
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Oct 7, 2014
Grant Date -
Aug 16, 2012
app pub date -
Apr 24, 2012
filing date -
Feb 9, 2006
priority date (Note) -
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Abstract
The present invention relates to a sheet material (2) comprising at least one first layer defining an outer surface of the sheet material and having at least one first color, at least one second layer comprising at least one watermark (6) and having at least one second color, the first and second colors having at least different saturations and/or hue angles.
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