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USPTO Data Jan 1 1976 - Oct 13 2026
3 Patents
#3,547 in Tokyo
#8,929 in Japan
Quadrac Co., Ltd.
Forward Citations = 0
5 inventors:
Quadrac Co., Ltd.
% Expired Patents = 100.0
EPO Patents = 1
Forward Citations = 0
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5 inventors (with patents filed for the assignee):
Susumu Kusakabe (3 out of 54 patents)
Fumio Kubono (2 out of 38 patents)
Mamoru Suzuki (1 out of 66 patents)
4. Masanobu Sato (1 out of 52 patents)
5. Keiichi Nanbu (1 out of 1 patent)
3 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Quadrac Co., Ltd.. Retrieved from https://idiyas.com/company/quadrac-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]