Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10429274 | Vertical high speed testing device for spiral seal of cone bit bearing | Yi Zhou, Yueming Zheng, Yang Xiao, Xia Wang, Tong Xu +2 more | 2019-10-01 |
| 10393615 | Horizontal high speed testing device for spiral seal of horizontal cone bit bearing | Yi Zhou, Yueming Zheng, Yang Xiao, Tong Xu, Xia Wang +3 more | 2019-08-27 |