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For the Inventor, By the Inventor

Tochigi, Japan

Koyo Engineering


USPTO Granted Patents = 1

Forward Citations = 1

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5 inventors (with patents filed for the assignee):

goldMedal Tetsu Tatsuma (1 out of 4 patents)

silverMedal Shuichi Saitoh (1 out of 2 patents)

bronzeMedal Katsuhisa Kashiwazaki (1 out of 2 patents)

4.  Yoshihisa Ohko (1 out of 1 patent)

5.  Akira Fujishima (1 out of 10 patents)


1 patent:

1. 6882459 - Photoreactive devices, translucent members, ornaments, anticorrosive devices, devices for reducing oxygen and devices for controlling growth of microorganisms (2005-04-19),
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USPTO Data Jan 1 1976 - Sep 15 2026

1 Patents

#53 in Tochigi

#15,982 in Japan

Tochigi, JP
Tochigi, Japan

Koyo Engineering

Forward Citations = 1

5 inventors:

goldMedal Tetsu Tatsuma (1 out of 4 patents)

silverMedal Shuichi Saitoh (1 out of 2 patents)

bronzeMedal Katsuhisa Kashiwazaki (1 out of 2 patents)

4.  Yoshihisa Ohko (1 out of 1 patent)

5.  Akira Fujishima (1 out of 10 patents)

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