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:
Jan. 25, 2005
Filed:
Sep. 27, 1999
Applicants:
Yuri A. Bobrov, Moscow, RU;
Leonid Y. Ignatov, Moscow, RU;
IR Gvon Khan, Moscow, RU;
Inventors:
Assignee:
Optiva, Inc., South San Francisco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 530 ; G02F 113 ; G02F 13335 ;
U.S. Cl.
CPC ...
Abstract
A decorative material is disclosed which comprises two polarizers and at least one phase-shifting plate placed between the polarizers. Each polarizer has a controlled direction of polarization axis. The phase-shifting plate represents a continuous layer of an optically anisotropic material containing regions differing by optical properties.