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. 09, 2003
Filed:
Jul. 05, 2001
Applicant:
Inventors:
Yoshio Sasaki, Tokorozawa, JP;
Toshihiko Maruyama, Tokorozawa, JP;
Eiji Muramatsu, Tokorozawa, JP;
Masahiro Kato, Tokorozawa, JP;
Seiro Oshima, Nakakoma-gun, JP;
Takao Tagiri, Nakakoma-gun, JP;
Assignee:
Pioneer Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 ;
U.S. Cl.
CPC ...
G11B 7/24 ;
Abstract
A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to form a plurality of groove portions; and a continuous groove area in which a continuous groove is formed, the continuous groove having a groove width smaller than a groove width in the segmented groove area.