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. 25, 2001
Filed:
Dec. 30, 1999
Tetsuya Inui, Nara, JP;
Hideaki Sato, Yamatokoriyama, JP;
Junichiro Nakayama, Shiki-gun, JP;
Naoyasu Iketani, Tenri, JP;
Michinobu Mieda, Shiki-gun, JP;
Yoshiteru Murakami, Nishinomiya, JP;
Junji Hirokane, Nara, JP;
Akira Takahashi, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.