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:
Nov. 28, 2000
Filed:
Sep. 15, 1998
Masayoshi Nakagawa, Fukushima-ken, JP;
ALPS Electric Co., Ltd., , JP;
Abstract
Each of servo patterns comprises servo information, an A burst signal and a B burst signal. The servo patterns are recorded at a smaller track pitch Tp in a data zone of a disk, and are recorded in a first nondata zone at a greater track pitch Tp1 greater than the smaller track pitch Tp. Therefore a tracking servo control operation is effective even if the magnetic head of a disk drive moves into the nondata zone. Since the servo patterns are recorded in the nondata zone at the greater pitch Tp1, the time necessary for recording the servo patterns can be reduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile