Issued Patents 2020
Showing 1–1 of 1 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 |