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:
May. 29, 2007
Filed:
Nov. 10, 2004
Masanori Takano, Miyagi, JP;
Takashi Abe, Miyagi, JP;
Nobufumi Takasu, Miyagi, JP;
Yoshiyuki Watanabe, Miyagi, JP;
Kiyoyuki Miyata, Miyagi, JP;
Masanori Takano, Miyagi, JP;
Takashi Abe, Miyagi, JP;
Nobufumi Takasu, Miyagi, JP;
Yoshiyuki Watanabe, Miyagi, JP;
Kiyoyuki Miyata, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
After a DC erasing is performed in a direction by permanent magnets on a servo signal recording part, servo signals are recorded in the signal recording area of the servo signal recording part by a magnetic field in the direction opposite to that of the DC erasing. Thus, in a recording method for a magnetic recording medium having a data signal recording part and the servo signal recording part on a magnetic layer, accurate servo signals can be recorded and reproduced even on the medium having the magnetic layer of 0.13 μm or smaller.