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:
Jun. 14, 2005
Filed:
Jan. 25, 2002
Kei Yasuna, Chiyoda, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Kenichiro Sugiyama, Chiyoda, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk apparatus includes an actuator for moving a head to a position above the magnetic disk in a servo track movement operation, a range limiter for limiting a movable range of the actuator, a range specifier for setting a specific range of the actuator in the movable range of the actuator, and a control unit. The control unit enables writing a servo signal into the specific range at servo track movement pitch based on servo tracks recorded with the servo signal, correcting the servo track movement pitch on the basis of the number of servo tracks in the specific range and executing control to write the servo signal at corrected servo track movement pitch.