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:
Feb. 21, 2012
Filed:
Dec. 11, 2008
Applicants:
Fumi Hara, Takasaki, JP;
Takeshi Otsu, Takasaki, JP;
Isao Matsuda, Takasaki, JP;
Shingo Katoh, Takasaki, JP;
Masashi Satoh, Takasaki, JP;
Inventors:
Fumi Hara, Takasaki, JP;
Takeshi Otsu, Takasaki, JP;
Isao Matsuda, Takasaki, JP;
Shingo Katoh, Takasaki, JP;
Masashi Satoh, Takasaki, JP;
Assignee:
Taiyo Yuden Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical information recording medium has at least an optical reflective layer, an optical recording layer, an protective layer, and an optical transparency layer formed in that order on the main surface of a disc-shaped substrate. An area in which the protective layer is formed is made wider than an area in which the reflective layer is formed, and made narrower than an area in which the optical transparency layer is formed.