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. 28, 2006
Filed:
Sep. 30, 2003
Kaoru Iseri, Fujisawa, JP;
Takashi Kuroda, Chigasaki, JP;
Nobuya Matsubara, Fujisawa, JP;
Kenji Ogasawara, Fujisawa, JP;
Fuminori Sai, Yokohama, JP;
Hiroshi Yanagisawa, Kamakura, JP;
Kaoru Iseri, Fujisawa, JP;
Takashi Kuroda, Chigasaki, JP;
Nobuya Matsubara, Fujisawa, JP;
Kenji Ogasawara, Fujisawa, JP;
Fuminori Sai, Yokohama, JP;
Hiroshi Yanagisawa, Kamakura, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A servo system wherein a read head R detects a servo pattern that is written on a magnetic disk by a write head W. Position control of the write head W is exercised in accordance with the detected servo pattern, and the read head R detects a propagation pattern that is written on the magnetic disk by the write head W. Position of the write head W is corrected in accordance with the detected propagation pattern.