Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11913312 | Intelligent oil extraction system using all-metal screw pump | Guang Zhou, Xuelei Sun, Xueling Sun, Zhihai Zhang | 2024-02-27 |
| 11841018 | All-metal conical combined screw pump suitable for petroleum field | Guang Zhou, Zhihai Zhang | 2023-12-12 |