EPO Patents = 1

Forward Citations = 2

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18 inventors (with patents filed for the assignee):

Shohei Oishi (2 out of 3 patents)

Yuji Ushijima (2 out of 2 patents)

Reiko Yashikida (2 out of 2 patents)

4. Akihiro Kuroyanagi (1 out of 4 patents)

5. Takaomi Sugihara (1 out of 4 patents)

6. Kanji Sugihara (1 out of 2 patents)

7. Minoru Fukazawa (1 out of 3 patents)

8. Tohru Kida (1 out of 4 patents)

9. Motohiro Yamamoto (1 out of 3 patents)

10. Mayuri Imagawa (1 out of 1 patent)

11. Hiroyuki Jindo (1 out of 1 patent)

12. Seiichi Okuyama (1 out of 1 patent)

13. Takuji Iida (1 out of 1 patent)

14. Ikuya Takahashi (1 out of 1 patent)

15. Kengo Kurisu (2 patents)

4 patents: Sort by Forward Citations

#3,053 in Tokyo

#7,579 in Japan

Tokai Carbon

Forward Citations = 2

18 inventors:

Shohei Oishi (2 out of 3 patents)

Yuji Ushijima (2 out of 2 patents)

Reiko Yashikida (2 out of 2 patents)

4. Akihiro Kuroyanagi (1 out of 4 patents)

5. Takaomi Sugihara (1 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokai Carbon. Retrieved from https://idiyas.com/company/tokai-carbon

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]

1 patent (EPO):

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]