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Gordon; Douglas C.
Kinburn, CA
No. of patents:

Patent Number Title Of Patent Date Issued
4891666 Copy indicator for a document January 2, 1990
A printed background pattern for a document is described, wherein the pattern masks a copy indicator which is revealed upon making a copy of the pattern using a digital optical scanning means. The background pattern comprises an area of microprinting with a type size having a line re

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