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:
Dec. 12, 2006
Filed:
Dec. 20, 2004
Applicants:
Masakazu Nishikawa, Kanagawa-ken, JP;
Tadashi Yasunaga, Kanagawa-ken, JP;
Kazuhiro Niitsuma, Kanagawa-ken, JP;
Inventors:
Masakazu Nishikawa, Kanagawa-ken, JP;
Tadashi Yasunaga, Kanagawa-ken, JP;
Kazuhiro Niitsuma, Kanagawa-ken, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/86 (2006.01);
U.S. Cl.
CPC ...
Abstract
A master carrier for magnetic transfer is equipped with a substrate having a land/groove pattern. The land/groove pattern is formed from a magnetic material and corresponds to information that is transferred to a magnetic recording disk. Each land in the land/groove pattern has four round corners whose radius is from 1% through 47% of the width of a data track on the disk.