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. 15, 2009
Filed:
Sep. 12, 2003
Applicants:
Hidekazu Hoshino, Yokohama, JP;
Itsuo Takeuchi, Yokohama, JP;
Mutsumi Sasaki, Yokohama, JP;
Inventors:
Assignee:
NHK Spring Co., Ltd., Yokohama-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09C 3/00 (2006.01); G03H 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A discrimination medium for objects by which counterfeiting can be prevented, authenticity of the article can be easily and reliably determined, and the production cost can be reduced is provided. In the discrimination medium, the support bodyand the patternappear to be the same color when viewed from a specific angle (for instance, viewing from the front). On the other hand, when the viewing angle is increased, the color of the patterncomposed of a multilayer thin film changes by color shift, whereby the patternbecomes a color different from the support body