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:
Aug. 24, 2010
Filed:
Sep. 28, 2007
Takashi Ishida, Yawata, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Mamoru Shoji, Sakai, JP;
Atsushi Nakamura, Kadoma, JP;
Junichi Minamino, Nara, JP;
Shigeru Furumiya, Himeji, JP;
Takashi Ishida, Yawata, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Mamoru Shoji, Sakai, JP;
Atsushi Nakamura, Kadoma, JP;
Junichi Minamino, Nara, JP;
Shigeru Furumiya, Himeji, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical disk includes a groove and a land. Data is recorded on either the land or the groove. A pitch of the groove and a pitch of the land are 0.32 μm or more. The optical disk has a data efficiency of 80% or more by adopting a format in which other types of user data are added to every plural user data sets. The data efficiency is defined by a ratio of a user data capacity that can be used by a user to a total data capacity of the optical disk.