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. 27, 1988
Filed:
Nov. 10, 1986
Applicant:
Inventor:
Ryuji Sakamoto, Ohta, JP;
Assignee:
Toshiba Silicone Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C / ; H01C / ;
U.S. Cl.
CPC ...
338114 ; 338 99 ; 29620 ;
Abstract
A key-touch sensor has an electric circuit formed on a first electrically insulating substrate covered with a carbon electrode, an electric circuit formed on a second electrically insulating substrate covered with a carbon electrode which is opposed to the electric circuit on the first substrate across a gap, and a pressure-sensitive electroconductive layer deposited to at least one of the first or second substrates and disposed to fill the gap.