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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 4850681 B1

PDFFull Text
Date of Patent:
Jul. 25, 1989

Filed:

Apr. 03, 1987

Optical modulation device

Applicant:
Inventors:

Masao Yamanobe, Machida, JP;

Yasuyuki Watanabe, Hiratsuka, JP;

Hajime Sakata, Hiratsuka, JP;

Yukitoshi Ohkubo, Yokohama, JP;

Tomoyuki Umezawa, Hiratsuka, JP;

Chiori Mochizuki, Yokohama, JP;

Kazuya Ishiwata, Yokosuka, JP;

Takayuki Ishii, Hiratsuka, JP;

Akihiko Nagano, Kawasaki, JP;

Etsuro Kishi, Yokohama, JP;

Ryoji Fujiwara, Kamakura, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Fitzpatrick, Cella, Harper & Scinto

Primary Examiner:

Stanley D Miller

Assistant Examiner:

Anita E Pellman

Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350348 ; 3503 / ; 350334 ;
Abstract

An optical modulation device for effecting optical modulation by controlling the diffraction phenomenon of light, which not only consumes a small amouhnt of the driving energy employed, such as a electric power, but which is also capable of improvements in reliability.

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Yamanobe, Masao. (1989). Optical modulation device (U.S. Patent No. 4850681). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4850681

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