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:
Apr. 13, 2010
Filed:
Jul. 16, 2004
Applicants:
Takashi Ishida, Yawata, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Mamoru Shoji, Sakai, JP;
Atsushi Nakamura, Kadoma, JP;
Junichi Minamino, Nara, JP;
Shigeru Furumiya, Himeji, JP;
Inventors:
Takashi Ishida, Yawata, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Mamoru Shoji, Sakai, JP;
Atsushi Nakamura, Kadoma, JP;
Junichi Minamino, Nara, JP;
Shigeru Furumiya, Himeji, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical disk includes a land and a groove. The optical disk has a data efficiency of 80% or more. Data is recorded on both the land and the groove. A distance between the center of the land and the center of the groove adjacent to the land is 0.28 μm or more. Thus, an optical disk having a storage capacity of 25 GB or more can be provided.