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. 28, 2004
Filed:
Jul. 03, 2001
Tatsuo Kawasaki, Kanagawa, JP;
Koyata Takahashi, Kanagawa, JP;
Kenichi Sekimoto, Kanagawa, JP;
Toru Futami, Kanagawa, JP;
Shigeru Hiramatsu, Kanagawa, JP;
Mutsumi Asano, Kanagawa, JP;
Yuji Kawara, Yamagata, JP;
Tsuyoshi Tanaka, Kanagawa, JP;
Tosoh Corporation, Yamaguchi, JP;
Abstract
An optical recording medium able to reproduce address information during seeking in which an optical head moves between tracks, to increase seek speed, to improve recording/reproduction speed and to obtain a good header reproducing signal is achieved by that the concave portions or convex portions constituting a reproducing signal in seeking reproduced even during seek and/or constituting a timing signal for writing a header signal are connected to each other in a direction orthogonal to the tracks, when these concave portions and/or convex portions are placed in positions equivalent to each other in the adjacent tracks.