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Kabushiki Kaisha Kumahira Seisakusho

USPTO Granted Patents = 2

Forward Citations = 9

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5 inventors (with patents filed for the assignee):

Minoru Tanaka (1 out of 7 patents)

Kango Hinohara (1 out of 1 patent)

Noriaki Yokomoto (1 out of 1 patent)

4. Makoto Nishikawa (1 out of 1 patent)

5. Kenichi Matsumura (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4561269 - Key-exchangeable lock (1985-12-31),

2. 3976974 - Card-controlled lock installations including matrix circuits (1976-08-24),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#602 in

#10,962 in Japan

Kabushiki Kaisha Kumahira Seisakusho

Forward Citations = 9

5 inventors:

Minoru Tanaka (1 out of 7 patents)

Kango Hinohara (1 out of 1 patent)

Noriaki Yokomoto (1 out of 1 patent)

4. Makoto Nishikawa (1 out of 1 patent)

5. Kenichi Matsumura (1 out of 1 patent)

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