Tokyo, Japan

Nihonkagakusangyo Co., Ltd.

Calculating rank
USPTO Granted Patents = 4

Forward Citations = 3

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12 inventors (with patents filed for the assignee):

goldMedal Makoto Uchida (2 out of 15 patents)

silverMedal Katsuyoshi Kakinuma (2 out of 13 patents)

bronzeMedal Akihiro Iiyama (2 out of 9 patents)

4.  Hajime Kashima (2 out of 2 patents)

5.  Chisato Arata (2 out of 2 patents)

6.  Kazuhiro Hamada (1 out of 1 patent)

7.  Yoshito Sugibuchi (1 out of 1 patent)

8.  Takeo Tsukamoto (1 out of 166 patents)

9.  Toshio Kutami (1 out of 1 patent)

10.  Miyoshi Okamura (1 out of 1 patent)

11.  Isao Amemiya (1 out of 1 patent)

12.  Sumitaka Watanabe (1 out of 1 patent)


4 patents:

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USPTO Data Jan 1 1976 - Nov 3 2026

4 Patents

#3,059 in Tokyo

#7,591 in Japan

Tokyo, JP
Tokyo, Japan
Forward Citations = 3

12 inventors:

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nihonkagakusangyo Co., Ltd.. Retrieved from https://idiyas.com/company/nihonkagakusangyo-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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