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. 28, 1998
Filed:
Jun. 19, 1996
Applicant:
Inventors:
Mikio Yoshida, Miyagi, JP;
Etsuro Ikeda, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 13 ; 360114 ;
Abstract
A magneto-optic disc comprised of a substrate on which are formed a recording layer and a protective film and on which information is recorded by a magnetic head floating above the magneto-optic disc by a predetermined floating distance at least at the time of recording the information, wherein the height of the projections on the surface of the protective film of the magneto-optic disc is smaller than the floating distance of the magnetic head.