Takeo Komamura (3 out of 4 patents)
Kenzo Komamura (1 out of 2 patents)
Yuji Nishizawa (6 patents)
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USPTO Data Jan 1 1976 - Oct 13 2026
3 Patents
#94 in Chiba
#8,929 in Japan
Sofken Company, Ltd.
Forward Citations = 16
2 inventors:
Sofken Company, Ltd.
% Expired Patents = 33.3
EPO Patents = 1
Forward Citations = 16
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2 inventors (with patents filed for the assignee):
3 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sofken Company, Ltd.. Retrieved from https://idiyas.com/company/sofken-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]
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]