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USPTO Data Jan 1 1976 - Oct 20 2026
1 Patents
#543 in Kanagawa
#15,759 in Japan
Keikichi Sugiyama
Forward Citations = 8
4 inventors:
Keikichi Sugiyama
Calculating rank
Forward Citations = 8
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4 inventors (with patents filed for the assignee):
Makoto Egawa (1 out of 1 patent)
Akira Fukushima (1 out of 1 patent)
Koji Takada (1 out of 4 patents)
4. Keikichi Sugiyama (1 out of 6 patents)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Keikichi Sugiyama. Retrieved from https://idiyas.com/company/keikichi-sugiyama
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]