Company Badge
USPTO Data Jan 1 1976 - Oct 20 2026
5 Patents
#234 in Kanagawa
#6,654 in Japan
Otsuka Koki Co., Ltd.
Forward Citations = 30
12 inventors:
Otsuka Koki Co., Ltd.
% Expired Patents = 60.0
EPO Patents = 3
Forward Citations = 30
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12 inventors (with patents filed for the assignee):
Satoru Masuda (4 out of 16 patents)
Naoto Shibui (3 out of 6 patents)
Tomoya Sugiyama (2 out of 4 patents)
4. Hideto Nebuya (2 out of 18 patents)
5. Masateru Momozu (2 out of 4 patents)
6. Yukiyoshi Akutsu (2 out of 2 patents)
7. Takaya Azumi (1 out of 1 patent)
8. Hiroyuki Ishigami (1 out of 1 patent)
9. Masao Komatsuzaki (1 out of 1 patent)
10. Teruaki Kasai (1 out of 1 patent)
11. Seiichi Tanaka (1 out of 1 patent)
12. Takeshi Ejiri (1 out of 1 patent)
13. Naoto c/o Honda R&D Co Ltd Shibui (0 patent)
14. Hideto c/o Honda R&D Co Ltd Nebuya (0 patent)
15. Tomoya c/o Otsuka Koki Co Ltd Sugiyama (0 patent)
5 patents:
Company Overview
Otsuka Koki Co., Ltd. is a leading manufacturer of industrial machinery and equipment based in Japan. With over 50 years of experience, the company specializes in the production of high-quality hydraulic presses, die spotting presses, and casting machines for a variety of industries. Their commitment to innovation and customer satisfaction has earned them a strong reputation in the industry.
Profile summary synthesized from public USPTO records and patent filings.
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Otsuka Koki Co., Ltd.. Retrieved from https://idiyas.com/company/otsuka-koki-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]
3 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]