METHOD OF FORMING SECURITY MARKINGS
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United States of America Patent
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N/A
Issued Date -
Mar 20, 2014
app pub date -
Sep 19, 2012
filing date -
Sep 19, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of forming security markings on a printing plate includes forming a first plurality of square spots (156) less than or equal to 11 microns; wherein a first group (157) of the first plurality of square spots is formed in a first pattern (158); and wherein the first pattern is less than or equal to 66 microns and comprises a first microdot.
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