Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10228022 | Manufacturing method of precision machine tool bearing with high precision stability | Dongsheng Qian, Lin Hua, Huajie Mao, Qinglong Liu | 2019-03-12 |
| 9919390 | Combined ring rolling method for spherical valve body | Lin Hua, Dongsheng Qian, Xiaokai Wang | 2018-03-20 |