Company Badge
USPTO Data Jan 1 1976 - Oct 20 2026
1 Patents
#201 in Tianjin
#18,808 in China
Chna Oilfield Services Limited
Forward Citations = 0
7 inventors:
Chna Oilfield Services Limited
Forward Citations = 0
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7 inventors (with patents filed for the assignee):
Xiangxin Chen (1 out of 1 patent)
Yu Cheng (1 out of 1 patent)
Guangwei Wang (1 out of 1 patent)
4. Zhibo Xue (1 out of 2 patents)
5. Fang Sai (1 out of 1 patent)
6. Jiawei Zhang (1 out of 2 patents)
7. Jingzhi Chen (1 out of 1 patent)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Chna Oilfield Services Limited. Retrieved from https://idiyas.com/company/chna-oilfield-services
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]