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:
Jun. 14, 1988
Filed:
May. 22, 1987
Applicant:
Inventors:
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338176 ; 338309 ; 338314 ;
Abstract
A variable resistor for use in vehicles and electric apparatus having a resistive body whose resistance value is hardly affected by abrasion. The resistive body is composed of a lower resistive layer formed on the surface of a substrate and an upper resistive layer formed on said lower resistive layer, wherein said upper resistive layer has 2 to 500 times greater value of volume resistivity compared with said lower resistive layer.