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:
May. 11, 2010
Filed:
Feb. 11, 2005
Applicants:
Tatsuo Ohta, Otsuki, JP;
Takashi Nozaki, Hino, JP;
Yayoi Eguro, Hachioji, JP;
Takeshi Kojima, Hachioji, JP;
Inventors:
Tatsuo Ohta, Otsuki, JP;
Takashi Nozaki, Hino, JP;
Yayoi Eguro, Hachioji, JP;
Takeshi Kojima, Hachioji, JP;
Assignee:
Konica Minolta Opto, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical element for use in an optical pickup apparatus includes a substrate made of resin; an antireflection layer coating the substrate and having a low refractive index layer and a high refractive index layer,