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:
Sep. 10, 2013
Filed:
Aug. 31, 2010
Seiji Morita, Yokohama, JP;
Koji Takazawa, Tokyo, JP;
Kazuyo Umezawa, Yokohama, JP;
Hideo Ando, Hino, JP;
Yasuaki Ootera, Kawasaki, JP;
Naoki Morishita, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Seiji Morita, Yokohama, JP;
Koji Takazawa, Tokyo, JP;
Kazuyo Umezawa, Yokohama, JP;
Hideo Ando, Hino, JP;
Yasuaki Ootera, Kawasaki, JP;
Naoki Morishita, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.