Anti-copy layer utilizing spectral fragments
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 20, 2001
Grant Date -
N/A
app pub date -
May 10, 1999
filing date -
May 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An anti-copy layer or film for documents that is substantially transparent to the legitimate user, comprising a multiplicity of small fragments of spectral material embedded within an optically clear coating, wherein multi-angular illumination of the fragments by a copy apparatus generates sufficient amounts of visual noise in a copy as to prevent true-copy replication of the documents.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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