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:
Nov. 07, 1995
Filed:
Jan. 12, 1993
Applicant:
Inventors:
Ichiro Makino, Machida, JP;
Akira Mitsui, Yokohama, JP;
Mikio Takehara, Yokohama, JP;
Eiichi Ando, Yokohama, JP;
Junichi Ebisawa, Tokyo, JP;
Koichi Suzuki, Yokohama, JP;
Kiyoshi Matsumoto, Tokyo, JP;
Toru Iseda, Yokohama, JP;
Susumu Suzuki, Kawasaki, JP;
Assignee:
Asahi Glass Company Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; C23C / ; C03C / ;
U.S. Cl.
CPC ...
4286 / ; 428432 ; 428446 ; 428472 ; 428689 ; 4286 / ; 4286 / ; 428697 ; 428702 ; 428704 ; 501 51 ; 501 67 ; 20419216 ; 20419215 ; 2041922 ; 427130 ;
Abstract
A magnetic recording medium comprising a magnetic recording layer and at least one protective layer formed on the recording layer, wherein the outermost protective layer on the side exposed to air is made of an oxide film.