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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.:

US 4140378 B1

PDFFull Text
Date of Patent:
Feb. 20, 1979

Filed:

Aug. 06, 1976

View finder device having liquid crystal cell

Applicant:
Inventors:

Ryoichi Suzuki, Kawasaki, JP;

Seiichi Matsumoto, Yokohama, JP;

Takashi Amikura, Tokyo, JP;

Tokuichi Tsunekawa, Yokohama, JP;

Takashi Uchiyama, Yokohama, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Toren, McGeady and Stanger

Primary Examiner:

Russell E Adams

Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 53 ; 354 / ; 354 / ; 354289 ;
Abstract

A liquid crystal cell is provided within a camera viewfinder. In the cell, a liquid crystal is sandwiched between a resistance layer mounted on a substrate and another substrate-mounted layer which may be either resistive or conductive. Suitable means mask at least the end portions of the display of the liquid crystal cell. In operation, voltages corresponding to photographic conditions are applied to the layers to produce analog data indicative of photographic conditions.

Find Patent Forward Citations

Suzuki, Ryoichi. (1979). View finder device having liquid crystal cell (U.S. Patent No. 4140378). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4140378

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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