Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12422041 | Y-shaped packer | Meiqin Ma, Xiaojuan Chen, Chengang Shi, Yasheng Zhang, Ting Yin +3 more | 2025-09-23 |
| 11634879 | Tower packer for packing cement slurry of jacket | Baoquan Liu, Meiqin Ma, Jiande Tian, Yasheng Zhang, Chengang Shi +3 more | 2023-04-25 |