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:
Jun. 27, 2006
Filed:
Jul. 13, 2005
Applicants:
Yasushi Miyauchi, Akishima, JP;
Motoyasu Terao, Tokyo, JP;
Akemi Hirotsune, Higashimurayama, JP;
Hiroyuki Minemura, Kodaira, JP;
Harukazu Miyamoto, Kodaira, JP;
Inventors:
Yasushi Miyauchi, Akishima, JP;
Motoyasu Terao, Tokyo, JP;
Akemi Hirotsune, Higashimurayama, JP;
Hiroyuki Minemura, Kodaira, JP;
Harukazu Miyamoto, Kodaira, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Oosaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical reproducing method adds a dummy signal to at least a leading or trailing side of a recording signal recorded on an information recording medium. The duty ratio of the dummy signal is not greater than 50%, and the recording start position of the combined recording signal and dummy signal is shifted at random.