Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10640133 | Connecting rod type two-level locking device, hopper car bottom door and hopper car | Mingdao Sun, Qiangjun Jiang, Fengwei Liu, Baolei Wang, Wenliang Liu +4 more | 2020-05-05 |
| 10053118 | Sidewall structure of hopper car | Biaowen Xiang, Wenliang Liu, Liangcai Lin, Bin Ling, Huanyun Liu +4 more | 2018-08-21 |
| 9789883 | Two-level locking device, hopper car bottom door and hopper car | Mingdao Sun, Qiangjun Jiang, Fengwei Liu, Baolei Wang, Wenliang Liu +4 more | 2017-10-17 |