Company Badge
USPTO Data Jan 1 1976 - Nov 3 2026
1 Patents
#69 in Anhui
#18,890 in China
China Railway No. 4 Engineering Group Co., Ltd.
Forward Citations = 0
13 inventors:
China Railway No. 4 Engineering Group Co., Ltd.
Calculating rank
Forward Citations = 0
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13 inventors (with patents filed for the assignee):
Zhiyong Wang (1 out of 3 patents)
Jianwei Peng (1 out of 3 patents)
Hai Huang (1 out of 3 patents)
4. Juan Chen (1 out of 2 patents)
5. Jie Tang (1 out of 3 patents)
6. Jianan Yao (1 out of 3 patents)
7. Yitao Chen (1 out of 2 patents)
8. Jianfeng Wen (1 out of 2 patents)
9. Xianzhu Hu (1 out of 1 patent)
10. Chenhao Wu (1 out of 1 patent)
11. Zhiwu Yu (1 out of 1 patent)
12. Chunhong Lin (1 out of 1 patent)
13. Dongdong Fan (1 out of 2 patents)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: China Railway No. 4 Engineering Group Co., Ltd.. Retrieved from https://idiyas.com/company/china-railway-no-4-engineering-group
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]