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USPTO Data Jan 1 1976 - Nov 3 2026
2 Patents
#1,146 in Osaka
#11,154 in Japan
Sigma P.i. Co., Ltd.
Forward Citations = 46
4 inventors:
Sigma P.i. Co., Ltd.
Calculating rank
EPO Patents = 1
Forward Citations = 46
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4 inventors (with patents filed for the assignee):
Masahiko Ito (1 out of 54 patents)
Yoshitaka Shimada (1 out of 1 patent)
Yoshiharu Aoki (1 out of 2 patents)
4. Hisashi Nakano (1 out of 4 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sigma P.i. Co., Ltd.. Retrieved from https://idiyas.com/company/sigma-p-i-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]