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. 03, 1990
Filed:
May. 08, 1987
Applicant:
Inventors:
Akira Miyake, Kyoto, JP;
Mikio Kishimoto, Osaka, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428329 ; 427128 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording medium with improved durability is provided and comprises a non-magnetic substrate and a magnetic layer formed thereon containing magnetic powder of a platelet hexagonal system of ferrite particles, granular non-magnetic powder, a lubricant and a binder, the granular non-magnetic powder being contained in an amount of from 0.1 to 30 parts by weight per 100 parts by weight of the platelet hexagonal system of ferrite particles.
Quick Actions:
Miyake, Akira. (1990). Magnetic recording medium (U.S. Patent No. 4913959). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4913959
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile