% Expired Patents = 100.0

Forward Citations = 0

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8 inventors (with patents filed for the assignee):

Yohei Yagishita (1 out of 1 patent)

Kohei Yamaguchi (1 out of 3 patents)

Miwa Katayama (1 out of 1 patent)

4. Wataru Oda (1 out of 6 patents)

5. Akemi Inami (1 out of 1 patent)

6. Yoshiki Kubo (1 out of 3 patents)

7. Seiji Okazaki (1 out of 14 patents)

8. Akio Sakamoto (1 out of 8 patents)

1 patent: Sort by Forward Citations

#6,102 in Tokyo

#15,759 in Japan

Mt Carbon Co., Ltd.

Forward Citations = 0

8 inventors:

Yohei Yagishita (1 out of 1 patent)

Kohei Yamaguchi (1 out of 3 patents)

Miwa Katayama (1 out of 1 patent)

4. Wataru Oda (1 out of 6 patents)

5. Akemi Inami (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mt Carbon Co., Ltd.. Retrieved from https://idiyas.com/company/mt-carbon-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]