Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11008838 | Switchable crossover tool with hydraulic transmission | Bo Gao, Lonnie Carl Helms, Yuzhu Hu, Gary Joe Makowiecki | 2021-05-18 |
| 10914133 | Switchable crossover tool with rotatable chamber | Bo Gao, Lonnie Carl Helms, Yuzhu Hu, Gary Joe Makowiecki | 2021-02-09 |