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. 17, 1999
Filed:
Apr. 16, 1997
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
3692754 ; 3692752 ;
Abstract
An optical disk having thereon intermittent spiral guiding grooves composed of a pit array, wherein each guiding groove has a wobbling side wall at either side, so that the pit array is used as a data reproduce-only area and spaces between adjacent guiding grooves are used as a data recordable area, thereby realizing a high-density optical disk having both the data reproduce-only area and data recordable area.