Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11035486 | Spherical valve stem seat | — | 2021-06-15 |
| 10520086 | Apparatus and systems for preventing extrusion | — | 2019-12-31 |
| 9611696 | Directional drill hammer pullback device | Robert F. Crane | 2017-04-04 |
| 9169946 | Directional drill hammer pullback device | Robert F. Crane | 2015-10-27 |