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USPTO Data Jan 1 1976 - Oct 13 2026
2 Patents
#4,366 in Tokyo
#11,133 in Japan
Otsuka Iron Works, Ltd.
Forward Citations = 5
8 inventors:
Otsuka Iron Works, Ltd.
Forward Citations = 5
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8 inventors (with patents filed for the assignee):
Hidekazu Takahashi (2 out of 36 patents)
Sousuke Naito (2 out of 2 patents)
Toshio Watanabe (1 out of 37 patents)
4. Shunzo Shimai (1 out of 12 patents)
5. Tomeyoshi Nakajo (1 out of 1 patent)
6. Junya Yamano (1 out of 1 patent)
7. Yasuji Otsuka (1 out of 1 patent)
8. Toshio Watanabe (1 out of 28 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Otsuka Iron Works, Ltd.. Retrieved from https://idiyas.com/company/otsuka-iron-works
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]