Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11542758 | Linkage test apparatus for deepwater drilling riser and hang-off system | Xiuquan Liu, Yanwei LI, Hexiang Sun, Zhaowei Liu, Guoming Chen +4 more | 2023-01-03 |
| 8469080 | Digital processing method and device of large or medium-size sand mold | Zhongde Shan, Xinya Li, Feng Liu, Li Zhan, Xiaoli Dong | 2013-06-25 |