Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12345336 | Piston ring with hard plating, and preparation method therefor | Kaishun Li, Yueting Zhou, Guanfei Shi | 2025-07-01 |
| 12203553 | Wear-resistant and low-friction coated piston ring and preparation method therefor | Weiwei Shi, Guanfei Shi | 2025-01-21 |
| 11401598 | Friction reduced and wear resistant coating, preparation method thereof and piston ring | Bo Zhang, Kaishun Li | 2022-08-02 |
| 11215283 | Diamond-like coating for piston ring surfaces, piston ring and processes for preparing the same | Yingxue Wu, Yueting Zhou, Bo Zhang | 2022-01-04 |
| 9927029 | Multilayer multi-element composite hard pvd coating on the surface of a piston ring, a piston ring and a preparation process | Yingxue Wu, Bo Zhang | 2018-03-27 |