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:
Oct. 17, 2006
Filed:
Apr. 07, 2004
Applicant:
Koji Horibe, Kasugai, JP;
Inventor:
Koji Horibe, Kasugai, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2006.01); G11B 5/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical disk having an increased data storage capacity and accessible randomly, the positional shift of which can be quickly detected. An optical disk access device and access method are also disclosed. The optical disk () has a track (T) constructed of two kinds of the first sector (S) having an ID portion () and succeeding sectors (S) having only a sector mark portion (), and sector marks of the tracks are different from one another. The data area is increased by compressing the ID portion, and the different marks of the tracks enable quick detection of access positional shift.