Forward Citations = 6

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7 inventors (with patents filed for the assignee):

Toshiyuki Watanabe (2 out of 72 patents)

Hiroshi Shima (2 out of 24 patents)

Koich Matsumoto (2 out of 2 patents)

4. Toshikazu Osafune (2 out of 2 patents)

5. Minoru Yamamoto (1 out of 20 patents)

6. Kunio Nakasaki (1 out of 1 patent)

7. Teruo Nakazawa (1 out of 1 patent)

2 patents: Sort by Forward Citations

#4,361 in Tokyo

#11,124 in Japan

Nihon Doro Kodan

Forward Citations = 6

7 inventors:

Toshiyuki Watanabe (2 out of 72 patents)

Hiroshi Shima (2 out of 24 patents)

Koich Matsumoto (2 out of 2 patents)

4. Toshikazu Osafune (2 out of 2 patents)

5. Minoru Yamamoto (1 out of 20 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nihon Doro Kodan. Retrieved from https://idiyas.com/company/nihon-doro-kodan

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]