Halftone patterns for trusted printing
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United States of America Patent
Stats
-
Aug 31, 1999
Grant Date -
N/A
app pub date -
Jan 29, 1998
filing date -
Jan 29, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Predetermined machine and/or human readable information is embedded in at least one serpentine pattern that is printed on each original document, so that any given instance of such a document can be later verified or refuted as being the original by determining whether this information can be recovered from the document or not.
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Family
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Cited Art Landscape
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