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. 23, 1997
Filed:
Jun. 09, 1995
Applicant:
Inventor:
Ryoji Muramatsu, Sendai, JP;
Assignee:
Tokin corporation, Miyagi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; H01J / ;
U.S. Cl.
CPC ...
324 96 ;
Abstract
An electric field sensor includes an electric field sensor head (13) for varying an intensity of a propagating light beam from a light source (19) in response to an electric field intensity of an input signal received by a reception antenna (11). A photo-electric converter (21) converts the propagating light beam into an output signal. A correcting device (27) compares the output signal with a reference signal to produce and supply a control signal to the photo-electric converter.