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. 11, 2014
Filed:
Aug. 30, 2011
Applicants:
Hiroki Ohtsu, Odawara, JP;
Yuichi Kurihashi, Odawara, JP;
Kazuyuki Shiino, Odawara, JP;
Inventors:
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/03 (2006.01); G11B 5/78 (2006.01);
U.S. Cl.
CPC ...
Abstract
To manufacture a perpendicular magnetic recording-type magnetic tape having a servo signal written therein by a write head having a magnetic gap, a perpendicular direct-current erasing step in which a magnetic tape is magnetized in one direction that is one of two opposite thickness directions of the magnetic tape is performed before a signal writing step in which a servo signal is written in the magnetic tape by outputting a pulsed signal to the write head.