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:
Apr. 27, 1999
Filed:
May. 20, 1997
Applicant:
Inventors:
Eiki Oyanagi, Miyagi, JP;
Osamu Morita, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360135 ;
Abstract
A magnetic disk unit provided with a magnetic disk, a slider operatively configured and supported on a pivoting arm, a vertical recording magnetic head provided on said slider, and an information record section provided on the magnetic disk in the form of protrusions covered with magnetic material, said information record section accepting a vertical magnetic recording signal from said vertical magnetic recording head, thus providing a magnetic head operated with a small lift amount to suppress spacing loss in the vertical magnetic recording and improved recording and reproducing performance of a vertical magnetic recording disk unit system.