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Koken Kaihatsu Co., Ltd.

USPTO Granted Patents = 2

Forward Citations = 27

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5 inventors (with patents filed for the assignee):

Takamitsu Anno (2 out of 2 patents)

Manabu Mizutani (1 out of 3 patents)

Kanji Katsukawa (1 out of 1 patent)

4. Shoji Takada (1 out of 2 patents)

5. Gousuke Anno (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5371680 - Accounting book automatic entering device (1994-12-06),

2. 5271781 - Method of making a thermoplastic sheet with cement particles for use on (1993-12-21),

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USPTO Data Jan 1 1976 - Dec 9 2025

2 Patents

#4,070 in Tokyo

#10,988 in Japan

Koken Kaihatsu Co., Ltd.

Forward Citations = 27

5 inventors:

Takamitsu Anno (2 out of 2 patents)

Manabu Mizutani (1 out of 3 patents)

Kanji Katsukawa (1 out of 1 patent)

4. Shoji Takada (1 out of 2 patents)

5. Gousuke Anno (1 out of 1 patent)

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