Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421764 | Curved groove ball bearing mechanism | Kangquan Guo, Qunzhuo Li | 2022-08-23 |
| 10895281 | Curved groove ball bearing without retainer | Kangquan Guo, Yaohua Hu, Wenjing Zhang, Mingfang WU | 2021-01-19 |
| 10549590 | Assembly comprising a towing hook orifice covering plate and a skin | Zhongyu Ma | 2020-02-04 |
| 9127655 | Liquid nitrogen pump equipment load testing and experimenting apparatus and testing and experimenting method thereof | Shulong Wang, Xianying Tan, Xiaolin Wang, Hongguang Zhang, Yongqing Shi | 2015-09-08 |