Optically active structure for secured documents and the like, and methods for their production
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
N/A
app pub date -
Jan 27, 2003
filing date -
Jul 27, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A secured document contains at least two sets of information on an information layer, the sets of information providing different informational contents when the data carrier is viewed from different angles. The document contains an optically active microstructure having at least two different regions which are transparent, wherein one region has a diffraction structure and the other region is free of diffraction structures. The sets of information which are to be read are disposed in regions beneath the microstructure. The microstructure may comprise a hologram-like sheet in which a grid-like diffraction structure is embossed by means of an embossing punch.
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