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. 25, 1991
Filed:
Aug. 12, 1988
Applicant:
Inventors:
Eugenio Berti, San Jose, CA (US);
Ashraf I El-Sadi, San Jose, CA (US);
Assignee:
Unisys Corp., Detroit, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 7702 ; 360 7705 ; 360 7708 ;
Abstract
Shown is a disk drive arrangement with servo-mechanism for controlling (thin-film) head position, etc.; the servo having a disk face dedicated to servo tracks, rendered in 'Quad' code, with special timing indicia to separate position indicia, with position signals being deployed to follow, and to be terminated by, like, distinct timing sequences.