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:
Aug. 24, 2004
Filed:
Jul. 15, 2002
Koji Ishii, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A magnetic disk drive system having a write head H and a read head H which can move over a magnetic disk in a radial direction of the disk and are arranged at a distance from each other. At a predetermined write start timing t , it writes measurement information by the write head in a specific sector at a first timing t , then reads the information by the read head, detects predetermined positional information included in the information, and produces a second timing t . The system subtracts the interval between the second timing and the start timing from the interval between the first timing and second timing to measure the write/read head distance time difference in the track direction of the magnetic head unit. The write/read head distance information is used for correction and control of the operation of the magnetic head unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile