% Expired Patents = 100.0

CIPO Patents = 1

Forward Citations = 10

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9 inventors (with patents filed for the assignee):

Makoto Hashizume (1 out of 19 patents)

Hajime Kenmotsu (1 out of 3 patents)

Yukihide Iwamoto (1 out of 6 patents)

4. Hiroshi Ishii (1 out of 5 patents)

5. Kouichi Ohno (1 out of 2 patents)

6. Kazuo Yuge (1 out of 3 patents)

7. Hiroshi Yaegashi (1 out of 1 patent)

8. Masahiro Katou (1 out of 2 patents)

9. Shinichiro Takasugi (1 out of 2 patents)

10. Kazuhide Ebine (4 patents)

11. Yuji Matsuda (23 patents)

12. Kenjiro Fujii (5 patents)

13. Masayuki Oshiro (6 patents)

14. Katsumasa Nagai (1 patent)

15. Tsukasa Shiina (6 patents)

1 patent: Sort by Forward Citations

1. 8858397 - Training device and a control method of the same (2014-10-14),

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USPTO Data Jan 1 1976 - Oct 20 2026

1 Patents

#171 in Chiba

#15,759 in Japan

Chiba, Japan

Hitachi Keiyo Engineering & Systems, Ltd.

Forward Citations = 10

9 inventors:

Makoto Hashizume (1 out of 19 patents)

Hajime Kenmotsu (1 out of 3 patents)

Yukihide Iwamoto (1 out of 6 patents)

4. Hiroshi Ishii (1 out of 5 patents)

5. Kouichi Ohno (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Keiyo Engineering & Systems, Ltd.. Retrieved from https://idiyas.com/company/hitachi-keiyo-engineering-and-systems

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 (CIPO):

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]