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. 11, 2012
Filed:
Mar. 11, 2009
Applicant:
Hiroto Takeshita, Kawasaki, JP;
Inventor:
Hiroto Takeshita, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 14/00 (2006.01); G11B 5/00 (2006.01); G11B 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Although dots and servo patterns are made of the same magnetic material, the dots have a relatively low coercive force so as to allow data deletion and rewrite by a magnetic head, while the servo patterns have a high coercive force compared with the coercive force of the dots. The coercive force of the servo patterns is strong enough so as to eliminate the influence of shape magnetic anisotropy.
Takeshita, Hiroto. (2012). Magnetic recording medium, magnetic recording and reproducing device with magnetic recording medium, and magnetic-recording-medium manufacturing method (U.S. Patent No. 8329249). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8329249
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile