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:
Sep. 04, 1984
Filed:
Dec. 23, 1980
Applicant:
Inventors:
Yoshiaki Takayanagi, Kawasaki, JP;
Koji Suzuki, Yokohama, JP;
Nao Nagashima, Tokyo, JP;
Hiroshi Ogawa, Yokohama, JP;
Kouki Kuroda, Yokohama, JP;
Joyji Nagahira, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
324 72 ; 324457 ; 324458 ;
Abstract
A surface potentiometer comprises a measuring electrode, a chopper for intermittently shielding the electric field between the measuring electrode and an object to be measured, a preamplifier circuit for converting an AC signal induced in the measuring electrode into a low impedance signal, and a printed substrate having the wiring pattern of the preamplifier circuit formed on one surface thereof and the electrode pattern of the measuring electrode formed on the other surface thereof.