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. 27, 2010
Filed:
Feb. 24, 2005
Applicant:
Hiroshi Maegawa, Kanagawa, JP;
Inventor:
Hiroshi Maegawa, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical disk includes a recording surface on which a plurality of pits, corresponding to multilevel (three level or higher) information, is formed as a spiral or concentric pit array. The pit array wobbles periodically. A plurality of predetermined reference marks, corresponding to a period of the wobble, are included in the pit array.
Maegawa, Hiroshi. (2010). Optical disk, signal generation method, clock signal generation method, and optical disk device (U.S. Patent No. 7706242). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7706242
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile