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. 16, 1985
Filed:
May. 23, 1983
Applicant:
Inventors:
Shozo Hideyama, Yokohama, JP;
Akio Ishizawa, Tokyo, JP;
Katuya Kumagai, Yokohama, JP;
Minoru Hashimoto, Yokohama, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
428212 ; 360134 ; 360135 ; 360136 ; 427128 ; 427131 ; 428328 ; 428329 ; 428408 ; 428694 ; 428900 ;
Abstract
Disclosed is a magnetic recording medium which comprises; a substrate; a first magnetic layer applied on the surface of the substrate and having an easy axis of magnetization in the in-plane direction of the substrate; and a second magnetic layer applied on the surface of the first magnetic layer, formed of ferrite series powder represented by the formula;