Forward Citations = 4

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8 inventors (with patents filed for the assignee):

Nobuo Takahashi (1 out of 9 patents)

Akio Hayashi (1 out of 50 patents)

Koichi Ogawa (1 out of 73 patents)

4. Norio Watanabe (1 out of 10 patents)

5. Ryuichi Isono (1 out of 1 patent)

6. Yoshio Fujioka (1 out of 1 patent)

7. Yousuke Yamada (1 out of 1 patent)

8. Yutaka Satoh (1 out of 1 patent)

1 patent: Sort by Forward Citations

#10 in Funabashi

#15,745 in Japan

Zenken Co., Ltd.

Forward Citations = 4

8 inventors:

Nobuo Takahashi (1 out of 9 patents)

Akio Hayashi (1 out of 50 patents)

Koichi Ogawa (1 out of 73 patents)

4. Norio Watanabe (1 out of 10 patents)

5. Ryuichi Isono (1 out of 1 patent)

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