Protected document and method of making same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 12, 1982
Issued Date -
N/A
app pub date -
Jul 23, 1980
filing date -
May 18, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a protected document such as a negotiable instrument, a title instrument, identification document or other documents which should be kept secure from illegal copying by color copiers. The method of making the document comprising preprinting a 'void' or other warning or cancellation phrase pattern in half tone or multitone on the document and camouflaging this pattern is also disclosed.
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Family
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Cited Art Landscape
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