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For the Inventor, By the Inventor

Tokyo, Japan

Ranco Japan Ltd.


USPTO Granted Patents = 3

Forward Citations = 45

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4 inventors (with patents filed for the assignee):

goldMedal Keiichiroh Nakatsukasa (2 out of 2 patents)

silverMedal Takao Matsumoto (1 out of 1 patent)

bronzeMedal Kenmei Kuneguchi (1 out of 1 patent)

4.  Ikuo Takahashi (1 out of 4 patents)


3 patents:

1. 5690144 - Directional control valve for switching the mode of operation in a heat (1997-11-25),
2. 5020771 - Proportional control valve (1991-06-04),
3. 4966194 - Four-way switching valve device (1990-10-30),
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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#3,263 in Tokyo

#8,771 in Japan

...
Tokyo, Japan

Ranco Japan Ltd.

Forward Citations = 45

4 inventors:

goldMedal Keiichiroh Nakatsukasa (2 out of 2 patents)

silverMedal Takao Matsumoto (1 out of 1 patent)

bronzeMedal Kenmei Kuneguchi (1 out of 1 patent)

4.  Ikuo Takahashi (1 out of 4 patents)

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