Mitsui E&s Du Co., Ltd.

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USPTO Granted Patents = 2

EPO Patents = 9

Forward Citations = 0

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2 inventors (with patents filed for the assignee):

Takashi Fujii (2 out of 7 patents)

Shigeki Kagomiya (1 out of 2 patents)

Yutaka Masuda (13 patents)

4. Yoshiyuki Umemoto (12 patents)

5. Keitoku Iguchi (1 patent)

6. Kazuki Yotsui (1 patent)

7. Yasunori Ashikaga (10 patents)

8. Ryoichi Kanehira (1 patent)

9. Mitsuaki Hayashi (3 patents)

10. Toshihiko Shimizu (2 patents)

11. Takeshi Yamada (52 patents)

12. Takayuki Yamada (126 patents)

13. Hirose Takayuki (0 patent)

14. Nakajima Hayato (0 patent)

15. Yamada Takayuki (0 patent)

2 patents: Sort by Forward Citations

1. 12228475 - Vibro-acoustic analysis method and device and equipment-abnormality-location estimation method and device (2025-02-18),

2. 11906465 - Magnetic material concentration measuring device (2024-02-20),

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USPTO Data Jan 1 1976 - Oct 27 2026

2 Patents

#1 in Aioi

#11,147 in Japan

Aioi, Japan

Mitsui E&s Du Co., Ltd.

Forward Citations = 0

2 inventors:

Takashi Fujii (2 out of 7 patents)

Shigeki Kagomiya (1 out of 2 patents)

Yutaka Masuda (13 patents)

4. Yoshiyuki Umemoto (12 patents)

5. Keitoku Iguchi (1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mitsui E&s Du Co., Ltd.. Retrieved from https://idiyas.com/company/mitsui-e-and-s-du-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]

9 patents (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]