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:
Sep. 18, 2012
Filed:
Aug. 03, 2005
Applicants:
Marc Schnieper, Onex-Genéve, CH;
Alexander Stuck, Wettingen, CH;
Harald Walter, Kilchberg, CH;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03H 1/00 (2006.01); G02B 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A security device comprises a zero order diffractive microstructure buried within a substrate. One or more further optical structures, such as microlenses, may be formed on a surface of the substrate. The further optical structures modify the optical characteristics of the zero order diffractive microstructure such as by enhancing or reducing the color effect produced by the zero-order diffractive microstructure upon tilting the security device.