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:
Dec. 21, 1993
Filed:
Mar. 17, 1992
Applicant:
Inventors:
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
427453 ; 427128 ; 427576 ;
Abstract
A magnetic film for recording a magnetic signal is formed on a surface of a base piece. The magnetic film contains Fe.sub.3 O.sub.4 of at least 30 wt %, preferably at least 75 wt %. For forming the magnetic film, a plasma spraying method is employed, in which an iron oxide (FeOx) is used for a thermal spraying powder, and a non-reducing gas is used as a working medium for the plasma spraying.