For the Inventor, By the Inventor

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Kitamura Valve Seizo Kabushiki Kaisha

USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 48

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4 inventors (with patents filed for the assignee):

Tutomu Saito (1 out of 21 patents)

Hidenori Yamaoka (1 out of 5 patents)

Masao Kawamura (1 out of 29 patents)

4. Hiroshi Yamazoe (1 out of 6 patents)

2 patents: Sort by Forward Citations

1. 4269391 - Valve sealing device and a valve (1981-05-26),

2. 4201239 - Sealing device for a valve (1980-05-06),

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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#4,058 in Tokyo

#10,964 in Japan

Kitamura Valve Seizo Kabushiki Kaisha

Forward Citations = 48

4 inventors:

Tutomu Saito (1 out of 21 patents)

Hidenori Yamaoka (1 out of 5 patents)

Masao Kawamura (1 out of 29 patents)

4. Hiroshi Yamazoe (1 out of 6 patents)

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