Optically variable devices, their production and use
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 22, 2017
Grant Date -
Aug 15, 2013
app pub date -
Apr 21, 2011
filing date -
Apr 21, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Security documents often incorporate optically variable devices to prevent or hinder counterfeiters. Disclosed herein are layered optically variable devices such as color-shift foils, and methods for their production and use. Such devices afford new techniques for a user of a security document to check quickly and easily whether the security document is a legitimate document or a counterfeit copy.
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