Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12371953 | Automatic small repair operation system for oil field | Duanguang Zhang, Junfang Shen, Qiuling Wang, Hailong Lv, Jiaojiao Zhang +3 more | 2025-07-29 |
| 12234692 | Automated apparatus for oil field drilling and workover operations | Duanguang Zhang, Junfang Shen, Jidi Yu, Qiuling Wang, Ye-Ran Ji +5 more | 2025-02-25 |