The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2014
Filed:
Aug. 10, 2007
Applicant:
Robert Whiteman, Berkshire, GB;
Inventor:
Robert Whiteman, Berkshire, GB;
Assignee:
De La Rue International Limited, Hampshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/00 (2006.01); B41M 3/14 (2006.01); B42D 15/00 (2006.01); B82Y 20/00 (2011.01);
U.S. Cl.
CPC ...
B42D 15/0026 (2013.01); B82Y 20/00 (2013.01); G02B 1/005 (2013.01); B41M 3/148 (2013.01); B42D 2033/26 (2013.01); B42D 2035/24 (2013.01);
Abstract
An optically variable security device comprises a photonic crystal of which incident light received by the crystal is selectively reflected or transmitted by the crystal to generate a first optically variable effect observable over a first set of directions. Incident light received by the crystal is also selectively reflected or transmitted by the crystal to generate an optical effect observable over a second set of directions that is different from the first set.