Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11566713 | Valve seat assembly having mating surfaces with a reverse taper angle | Jacob Poremski, John Brosnahan, Thomas J. Long, II | 2023-01-31 |
| 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 |
| 10851775 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, John Brosnahan, Michael Kelly | 2020-12-01 |
| 10344757 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, John Brosnahan, Michael Kelly | 2019-07-09 |