Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9441423 | Drilling rig masts and methods of assembly and erection | Robert Benjamin Donnally, Chunqiao Ren, Xi Lin Liu, Hui SHENG, Yan Yu | 2016-09-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9441423 | Drilling rig masts and methods of assembly and erection | Robert Benjamin Donnally, Chunqiao Ren, Xi Lin Liu, Hui SHENG, Yan Yu | 2016-09-13 |