Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9061688 | Bottom door device and hopper car having the same | Shuang Yang, Baichuan He, Lei Yu, Zhigang Li, Tianjun Zhao +2 more | 2015-06-23 |
| 8950340 | Ballast hopper car discharge door control system | Shengkun Wang, Yong Fu, Yongfeng Yi, Junlin Zhang | 2015-02-10 |
| 8939088 | Bottom door opening-closing mechanism, bottom door device and drop-bottom hopper car | Tianjun Zhao, Baichuan He, Shuang Yang, Lei Yu | 2015-01-27 |