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:
Dec. 29, 2009
Filed:
Dec. 17, 2007
Applicants:
Shinichiro Saito, Hachioji, JP;
Katsuya Sakamoto, Hachioji, JP;
Inventors:
Shinichiro Saito, Hachioji, JP;
Katsuya Sakamoto, Hachioji, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 7/135 (2006.01);
U.S. Cl.
CPC ...
Abstract
An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied:||≦0.07 λrms
Saito, Shinichiro. (2009). Optical pickup apparatus for recording or reproducing information for an optical information recording medium and objective lens for optical pickup apparatus (U.S. Patent No. 7639589). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7639589
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile