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. 09, 1989
Filed:
Jul. 30, 1987
Applicant:
Inventors:
Assignee:
Hitachi, Maxwell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 427 38 ; 427 41 ; 427 44 ; 427 48 ; 428694 ; 428900 ;
Abstract
A magnetic recording medium comprising a non-magnetic substrate, a soft magnetic layer formed thereon, and a perpendicularly magnetizable layer formed on the soft magnetic layer, where at least the soft magnetic layer is a vapor deposited mixture layer composed of an organic material and a ferromagnetic material, has distinguished flexibility and durability.
Kitakami, Osamu. (1989). Magnetic recording medium and process for preparing the same (U.S. Patent No. 4828919). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4828919
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