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:
Feb. 25, 1986
Filed:
Oct. 26, 1983
Applicant:
Inventors:
Issei Nakamura, Hachioji, JP;
Kenji Itozawa, Hachioji, JP;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428328 ; 252 6254 ; 360134 ; 360135 ; 360136 ; 427128 ; 427131 ;
Abstract
A magnetic recording medium comprising a support and a magnetic layer on said support. The magnetic layer is a unitary magnetic layer comprising ferromagnetic metallic powder. The average grain size of said ferromagnetic powder is not more than 0.5.mu., the ratio of the major axis to the minor axis (acicular ratio) of said powders is from 1.3 to 4.5, and the coercive force of said powder is from 1350 Oe to 1600 Oe.