Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11066902 | Power management system for a drilling rig | Yanchai Zhang | 2021-07-20 |
| 11028842 | Rig management system for transmission control of a hydraulic fracturing rig | Yanchai Zhang, Zhijun Cai | 2021-06-08 |
| 10927774 | Control of multiple engines using one or more parameters associated with the multiple engines | Zhijun Cai, Ronald Christopher Gayles, Yanchai Zhang, Stephen C. Nofsinger | 2021-02-23 |