Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11215283 | Diamond-like coating for piston ring surfaces, piston ring and processes for preparing the same | Qianxi Liu, 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 | Qianxi Liu, Bo Zhang | 2018-03-27 |