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:
Apr. 12, 1988
Filed:
Mar. 20, 1986
Toshihiro Sugaya, Tokyo, JP;
Nobuyuki Takagi, Tokyo, JP;
Norio Nakamura, Yokohama, JP;
Kazunori Moriya, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic disk comprises a data area and a single index servo sector area embedded in the data area. The servo sector has three or more servo information pattern sections formed side by side in the direction of data tracks in the data area. The servo information pattern sections each have a plurality of servo information bit cells formed in a predetermined pattern in a direction perpendicular to the direction of data tracks. The servo information bit cells are used to produce a position signal for positioning a read/write head. A servo system for positioning the read/write head averages a plurality of position signals obtained from the servo information pattern sections and uses the averaged position signal for positioning the read/write head.