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USPTO Data Jan 1 1976 - Nov 10 2026
1 Patents
#3 in Tsurugashima
#15,780 in Japan
Extein Corporation
Forward Citations = 5
3 inventors:
Extein Corporation
Calculating rank
% Expired Patents = 100.0
EPO Patents = 1
Forward Citations = 5
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3 inventors (with patents filed for the assignee):
Hiroyuki Hozumi (1 out of 8 patents)
Hiroshi Matsuo (1 out of 15 patents)
Yoichi Kurita (1 out of 2 patents)
4. Yoichi c/o Jamco Corporation Kurita (0 patent)
5. Hiroshi c/o Extein Corporation Matsuo (0 patent)
6. Hiroyuki c/o Jamco Corporation Hozumi (0 patent)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Extein Corporation. Retrieved from https://idiyas.com/company/extein
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]
1 patent (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]