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. 14, 1989
Filed:
Aug. 14, 1987
Applicant:
Inventor:
James N Krause, Morgan Hill, CA (US);
Assignee:
Seagate Technology, Inc., Scotts Valley, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 7808 ; 360 75 ; 360 53 ; 360 7813 ;
Abstract
A method and system using the magnetic hysteresis of a stepping motor to offset the position of a transducer relative to a disk target track during data recovery. The data recovery is accomplished by energizing selected phases of the stepping motor while moving to the target track and then de-energizing a selected phase during the final movement to the target track which results in the transducer being offset from the target track so that illegible information can be recovered.