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:
Apr. 21, 2009
Filed:
Jul. 14, 2004
Applicants:
Kazuo Kuroda, Saitama, JP;
Toshio Suzuki, Saitama, JP;
Inventors:
Kazuo Kuroda, Saitama, JP;
Toshio Suzuki, Saitama, JP;
Assignee:
Pioneer Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/005 (2006.01);
U.S. Cl.
CPC ...
Abstract
On an optical disc, a record mark having a variable length according to pit data DP is formed at a displaced position to which the record mark is displaced, in a direction crossing the reading direction thereof, according to a wobble signal WB obtained by modulating wobble data DW in a predetermined modulating method. A second wobble synchronization signal D-SYNCw, as a dummy, is recorded on the optical disc, away from the start position of the wobble data DW.