Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11566713 | Valve seat assembly having mating surfaces with a reverse taper angle | Jacob Poremski, Carrie Bartkowiak, Thomas J. Long, II | 2023-01-31 |
| 11156221 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, Carrie Bartkowiak, Michael Kelly | 2021-10-26 |
| 10954938 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, Carrie Bartkowiak, Michael Kelly | 2021-03-23 |
| 10851775 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, Carrie Bartkowiak, Michael Kelly | 2020-12-01 |
| 10662716 | Thin-walled earth boring tools and methods of making the same | Paul D. Prichard, Roger M. Stark | 2020-05-26 |
| 10344757 | Valve seats and valve assemblies for fluid end applications | Roger M. Stark, Carrie Bartkowiak, Michael Kelly | 2019-07-09 |
| D503181 | Cutting insert | James R. Kasperik | 2005-03-22 |
| D488491 | Cutting insert | James R. Kasperik | 2004-04-13 |
| D488492 | Cutting insert | James R. Kasperik | 2004-04-13 |
| D488175 | Cutting insert | James R. Kasperik | 2004-04-06 |
| D487901 | Cutting insert | James R. Kasperik | 2004-03-30 |
| D487756 | Cutting insert | James R. Kasperik | 2004-03-23 |
| D426561 | Cutting tool insert | James R. Kasperik | 2000-06-13 |