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USPTO Data Jan 1 1976 - Nov 3 2026
1 Patents
#32 in Sapporo
#15,774 in Japan
Kankyou Engineering Co., Ltd.
Forward Citations = 2
5 inventors:
Kankyou Engineering Co., Ltd.
Calculating rank
% Expired Patents = 100.0
EPO Patents = 1
Forward Citations = 2
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5 inventors (with patents filed for the assignee):
Seiichi Watanabe (1 out of 62 patents)
Yu Toriyabe (1 out of 1 patent)
Shigeo Yatsu (1 out of 1 patent)
4. Tamaki Shibayama (1 out of 1 patent)
5. Tadahiko Mizuno (1 out of 1 patent)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kankyou Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/kankyou-engineering-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]