Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |