Security document and verification method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 4, 2012
Grant Date -
Jan 12, 2006
app pub date -
Jul 25, 2002
filing date -
Jul 25, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A security document, such as a banknote or a check, is provided with a perforation pattern (5) having holes (5a, 5b) with elongate cross section. When viewing the perforation pattern (5) from a direction that is non-perpendicular to the surface of the document, different holes will have different optical transmission, which can be verified by eye or electronically. Perforation patterns (5) of this type are hard to forge and easy to verify.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully