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. 05, 2006
Filed:
Jul. 19, 2002
Mineo Moribe, Kawasaki, JP;
Sumio Kuroda, Kawasaki, JP;
Koichi Iida, Kawasaki, JP;
Hiroyuki Takemoto, Tokyo, JP;
Mineo Moribe, Kawasaki, JP;
Sumio Kuroda, Kawasaki, JP;
Koichi Iida, Kawasaki, JP;
Hiroyuki Takemoto, Tokyo, JP;
Fujitsu Limited, Kawasaki, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides an optical disk comprising: at least a rewritable region and a read-only data region, wherein the rewritable region includes a plurality of groove tracks and a plurality of land tracks, the read-only data region includes a plurality of groove tracks and a plurality of land tracks, read-only data comprising control data are written as concavo-convex pits to the groove tracks and/or the land tracks in the read-only data region, and the width of each groove in the read-only data region is smaller than that of each groove in the rewritable region. According to the first optical disk of the present invention, the area of rewritable regions for users can be ensured as broadly as possible failing to deteriorate the high-speed performance of the system.