Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421764 | Curved groove ball bearing mechanism | Qunzhuo Li, Fang Gu | 2022-08-23 |
| 11193418 | Double-cylinder internal combustion engine | Junchang Zhang, Hongling Jin, Mingfang WU, Zhijie Liu | 2021-12-07 |
| 10895281 | Curved groove ball bearing without retainer | Yaohua Hu, Wenjing Zhang, Fang Gu, Mingfang WU | 2021-01-19 |
| 9970484 | Curved trench ball bearing | Nuo Shi, Guisheng Guo, Yaohua Hu, Haixia Lu, Xingshu Li +1 more | 2018-05-15 |