Company Badge
USPTO Data Jan 1 1976 - Oct 13 2026
5 Patents
#91 in Nagano
#6,652 in Japan
Nihon Dennetsu Co., Ltd.
Forward Citations = 59
25 inventors:
Nihon Dennetsu Co., Ltd.
% Expired Patents = 20.0
Forward Citations = 59
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25 inventors (with patents filed for the assignee):
Katsuya Nakai (1 out of 7 patents)
Takeshi Hashimoto (1 out of 50 patents)
Kenji Tanaka (1 out of 94 patents)
4. Yi Cheng Huang (1 out of 1 patent)
5. Kazuyuki Fukuda (1 out of 1 patent)
6. Yasuhisa Sato (1 out of 1 patent)
7. Gaku Kumai (1 out of 1 patent)
8. Takashi Yoshikawa (1 out of 9 patents)
9. Fumiaki Shimizu (1 out of 2 patents)
10. Shigeru Nakano (1 out of 1 patent)
11. Kosaku Mitani (1 out of 2 patents)
12. Masamitsu Nakano (1 out of 1 patent)
13. Iwao Inoue (1 out of 1 patent)
14. Naotaka Uchida (1 out of 1 patent)
15. Yoshihiko Kurita (1 out of 1 patent)
5 patents:
Company Overview
Nihon Dennetsu Co., Ltd. is a leading Japanese construction company specializing in railway and bridge construction. With over 50 years of experience, the company has built a strong reputation for delivering high-quality infrastructure projects. Nihon Dennetsu is committed to innovation, sustainability, and safety in all of its projects.
Profile summary synthesized from public USPTO records and patent filings.
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nihon Dennetsu Co., Ltd.. Retrieved from https://idiyas.com/company/nihon-dennetsu-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]
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]
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]