both of, Japan

O & K Company Ltd.


USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 18

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4 inventors (with patents filed for the assignee):

goldMedal Tetsuya Tsukamoto (1 out of 2 patents)

silverMedal Koji Murakami (1 out of 9 patents)

bronzeMedal Hitoshi Ohta (1 out of 2 patents)

4 Keizo Kinoshita (1 out of 1 patent)


2 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

2 Patents

#52 in both of

#10,988 in Japan

...
both of, Japan
Forward Citations = 18

4 inventors:

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