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:
Aug. 06, 1991
Filed:
Mar. 28, 1990
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428329 ; 428694 ; 428900 ;
Abstract
A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer thereon containing a ferromagnetic CrO.sub.2 powder dispersed in a resin binder. The magnetic layer contains 0.01-1.0 wt % of Al.sub.2 O.sub.3 powder on the basis of the CrO.sub.2 powder so as to improve wear of magnetic heads.