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. 07, 1993
Filed:
Sep. 28, 1992
Applicant:
Inventors:
Seiichi Tanaka, Tokyo, JP;
Shigeru Tabei, Machida, JP;
Assignee:
Chugai Denki Kogyo K.K., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
428673 ; 428674 ; 428929 ; 200267 ;
Abstract
A bimetallic or trimetallic electrical contact, only its shank portion being made of copper or copper alloy and being covered by a thin layer of silver or silver alloy for protecting the shank portion from environmental erosion. Said shank portion is preferably made by cutting silver-plated wire to a short piece.