Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156221 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, John Brosnahan, Michael Kelly | 2021-10-26 |
| 10954938 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, John Brosnahan, Michael Kelly | 2021-03-23 |