For the Inventor, By the Inventor

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Irie Koken Kabushiki Kaisha

USPTO Granted Patents = 2

Forward Citations = 38

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4 inventors (with patents filed for the assignee):

Toshio Sawa (2 out of 4 patents)

Yuzo Hayashi (2 out of 4 patents)

Norikimi Irie (2 out of 4 patents)

4. Toshiro Katagiri (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5087017 - Valve body for non-sliding type gate valve (1992-02-11),

2. 5002255 - Non-sliding gate valve for high vacuum use (1991-03-26),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#4,062 in Tokyo

#10,962 in Japan

Irie Koken Kabushiki Kaisha

Forward Citations = 38

4 inventors:

Toshio Sawa (2 out of 4 patents)

Yuzo Hayashi (2 out of 4 patents)

Norikimi Irie (2 out of 4 patents)

4. Toshiro Katagiri (1 out of 1 patent)

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