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:
Jul. 15, 2003
Filed:
Feb. 16, 2001
Eiji Muramatsu, Tokorozawa, JP;
Shoji Taniguchi, Tokorozawa, JP;
Masahiro Kato, Tokorozawa, JP;
Kazuo Kuroda, Tokorozawa, JP;
Masami Oishi, Tokorozawa, JP;
Pioneer Corporation, Tokyo-To, JP;
Abstract
An optical disc ( ) is provided with: a disc substrate ( ); an information track ( , G) formed on the disc substrate spirally or coaxially around a center of the disc substrate, on which an information signal including a physical sector number is to be recorded; and a guide track ( , L) adjacent to the information track and formed on the disc substrate spirally or coaxially around the center, on which a guide signal including address information is to be recorded, wherein a readable emboss area, in which the information signal is recorded by an emboss pit, and an unreadable emboss area, in which an unreadable emboss pit to disable writing and reading the information signal, are formed on the information track, and the guide signal is not recorded on the guide track corresponding to the readable emboss area and the guide signal is recorded on the guide track corresponding to the unreadable emboss area.