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USPTO Data Jan 1 1976 - Oct 20 2026
3 Patents
#51 in London
#4,374 in Canada
The Chas. Chapman Company Limited
Forward Citations = 17
3 inventors:
The Chas. Chapman Company Limited
% Expired Patents = 33.3
Forward Citations = 17
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3 inventors (with patents filed for the assignee):
Charles G Shepherd (2 out of 41 patents)
David R Chapman (2 out of 2 patents)
Eric Lloyd Chapman (1 out of 1 patent)
3 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: The Chas. Chapman Company Limited. Retrieved from https://idiyas.com/company/chas-chapman-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]
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]