Issued Patents 2025
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12345336 | Piston ring with hard plating, and preparation method therefor | Kaishun Li, Qianxi Liu, Yueting Zhou | 2025-07-01 |
| 12203553 | Wear-resistant and low-friction coated piston ring and preparation method therefor | Weiwei Shi, Qianxi Liu | 2025-01-21 |