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. 18, 1991
Filed:
Oct. 17, 1986
Applicant:
Inventors:
Jesse I Stamness, Los Altos Hills, CA (US);
Raymond W Morrow, San Jose, CA (US);
Edward E Asato, Sunnyvale, CA (US);
Assignee:
Unisys Corp., Detroit, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 45 ; 360 27 ;
Abstract
Write precompensation data is recorded on a disk of a magnetic disk drive indicating the write compensation to be provided for each of a plurality of head/media combination which may have relatively wide variations in performance characteristics. Apparatus is provided for transferring and storing this write precompensation data in the disk controller at start-up and for accessing this stored data during each write operation to provide a 'tailored' write precompensation for the particular head/media combination to be employed for the writing operation.