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:
Oct. 03, 1989
Filed:
Feb. 22, 1988
Applicant:
Inventor:
Hiromi Nakamura, Zama, JP;
Assignee:
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
428611 ; 148306 ; 148903 ;
Abstract
A magnetic scale includes a magnetic base member and a thin film formed on a surface of the magnetic member by plating or flame spraying nickle, chromium, manganese, silicon, boron, carbon, or a combination thereof. A laser beam or an arc discharge is applied to the outer circumferential surface of the thin film to fuse the metal of thin film and the metal of the base member under heat for thereby forming nonmagnetic modified portions on the surface of the base member.