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:
May. 03, 1988
Filed:
May. 30, 1984
Applicant:
Inventors:
Satoshi Yoshihara, Kawasaki, JP;
Shigeharu Iijima, Kawasaki, JP;
Katsuhiko Takano, Yokohama, JP;
Mitsuharu Sawamura, Yokohama, JP;
Masaaki Matsushima, Machida, JP;
Hiroyoshi Kishi, Tokyo, JP;
Eizo Sasamori, Yokohama, JP;
Susumu Ito, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428469 ; 428472 ; 428694 ; 428900 ;
Abstract
A magnetic recording medium comprising a substrate, a magnetic recording layer made of an amorphous magnetic film on the substrate, and an anticorrosive layer prepared by oxidation treatment of the surface of the amorphous magnetic film.