Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11389902 | Reducing surface asperities | Chao Ma, Neil Arthur Duffie, Xiaochun Li, Frank Ewald Pfefferkorn | 2022-07-19 |
| 10315275 | Reducing surface asperities | Chao Ma, Neil Arthur Duffie, Xiaochun Li, Frank Ewald Pfefferkorn | 2019-06-11 |