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:
Oct. 06, 1992
Filed:
Mar. 28, 1990
Applicant:
Inventors:
Keiichi Nishikawa, Kamakura, JP;
Shigemasa Yoshida, Kamakura, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 7708 ; 360 51 ;
Abstract
Magnetization inversion data at different frequencies are recorded as part of servo information before and after an erasing gap between a data sector and a servo sector, the time interval between pulses read out from these magnetization inversion data is detected using a gap detection timer, and a timing for reading out servo information is obtained according to the result of detection by the gap detection timer.