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.

Date of Patent:
Oct. 28, 2008

Filed:

Mar. 02, 2005
Applicants:

Morio Wada, Tokyo, JP;

Akira Miura, Tokyo, JP;

Tsuyoshi Yakihara, Tokyo, JP;

Masayuki Suehiro, Tokyo, JP;

Daisuke Hayashi, Tokyo, JP;

Shinji Iio, Tokyo, JP;

Toshimasa Umezawa, Tokyo, JP;

Takahiro Kudo, Tokyo, JP;

Takashi Mogi, Tokyo, JP;

Shoujirou Araki, Tokyo, JP;

Machio Dobashi, Tokyo, JP;

Katsuya Ikezawa, Tokyo, JP;

Inventors:

Morio Wada, Tokyo, JP;

Akira Miura, Tokyo, JP;

Tsuyoshi Yakihara, Tokyo, JP;

Masayuki Suehiro, Tokyo, JP;

Daisuke Hayashi, Tokyo, JP;

Shinji Iio, Tokyo, JP;

Toshimasa Umezawa, Tokyo, JP;

Takahiro Kudo, Tokyo, JP;

Takashi Mogi, Tokyo, JP;

Shoujirou Araki, Tokyo, JP;

Machio Dobashi, Tokyo, JP;

Katsuya Ikezawa, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 4/00 (2006.01); H04J 14/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An optical logic device performs a logic operation on a plurality of input light signals. The optical logic device has a photoelectric conversion portion, in which photoreceivers for receiving input light signals are provided in parallel, that outputs an electric signal obtained by adding up outputs of the photoreceivers, and a comparator that compares a voltage level of the electric signal outputted from the photoelectric conversion portion with a predetermined voltage level.


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