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:
Sep. 24, 1985
Filed:
Aug. 10, 1983
Applicant:
Inventors:
Kenji Yazawa, Yokohama, JP;
Kenichi Baba, Yokohama, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
428621 ; 428216 ; 428336 ; 428635 ; 428642 ; 428678 ; 428668 ; 428693 ; 428694 ; 428900 ; 427131 ; 427132 ;
Abstract
A magnetic recording medium having a non-magnetic substrate on which a first bismuth Bi under layer, a first magnetic metal layer, a compound layer made of the magnetic metal, a second bismuth Bi under layer and a second magnetic metal layer are sequentially formed in this order.
Yazawa, Kenji. (1985). Magnetic recording medium (U.S. Patent No. 4543301). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4543301
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile