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Paper, Printing & Office Supplies
Class Information
Number:
283/93
Name:
Printed matter
>
Having revealable concealed information, fraud preventer or detector, use preventer or detector, or identifier
>
Utilizing electromagnetic radiation
> Having dot pattern
Description:
Subject matter wherein the printed matter is provided with structure in the form of a specific arrangement of a plurality of small geometric marks generally made by an imprinting process.
Patents under this class:
1
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Patent Number
Title Of Patent
Date Issued
3977007
Gray tone generation
Aug. 24, 1976
1
2
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