Company Badge
USPTO Data Jan 1 1976 - Oct 20 2026
1 Patents
#73 in Changsha
#18,808 in China
Changfeng Group Co., Ltd.
Forward Citations = 0
4 inventors:
Changfeng Group Co., Ltd.
% Expired Patents = 100.0
Forward Citations = 0
Loading Chart...
Loading Chart...
4 inventors (with patents filed for the assignee):
Wei Huang (1 out of 50 patents)
Huaping Zhang (1 out of 1 patent)
Xiaolan Hu (1 out of 1 patent)
4. Zhibin Rong (1 out of 1 patent)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Changfeng Group Co., Ltd.. Retrieved from https://idiyas.com/company/changfeng-group-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]