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. 16, 2005
Filed:
Oct. 25, 2001
Applicants:
Atsushi Yamaguchi, Saitama, JP;
Masahiro Kato, Saitama, JP;
Eiji Muramatsu, Saitama, JP;
Inventors:
Assignee:
Pioneer Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B007/24 ;
U.S. Cl.
CPC ...
Abstract
In an optical recording mediumcomprising groove tracksincluding a first area Ba for recording record information and a second area Ca in which predetermined data is formed as embossed pit rowsand a readout of other data overwritten and recorded on said embossed pit rowsis prevented, and land tracksformed between the adjacent groove tracks, a depth Ed and a duty of the embossed pit rowsare set so that a radial push-pull signal in the first area and a radial push-pull signal in the second area become the substantially same level.