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:
Mar. 25, 1997
Filed:
Jun. 05, 1995
Applicant:
Inventors:
Takashi Ishida, Osaka, JP;
Shunji O'Hara, Higashiosaka, JP;
Kenzo Ishibashi, Moriguchi, JP;
Tadashige Furutani, Kadoma, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 48 ; 369 59 ; 360 40 ; 360 51 ;
Abstract
A a recording method and apparatus for an optical disk employs a data format having a fixed pattern sync portion in which a minimum run length of zeros and the maximum run length of zeros are not adjacent to each other. As such temperature difference caused during recording the optical disk may be made smaller, thermal stress applied upon the medium may be reduced, the deterioration thereof may be restrained, and the repetitive frequency of the medium may be improved.