Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10100578 | Pressure control check valve for a down-the-hole drill hammer | — | 2018-10-16 |
| 10024103 | Down-the-hole drill hammer having a roller ramp clutch | Abram Simeon Lance | 2018-07-17 |
| 9938774 | Non-rotating drill bit for a down-the-hole drill hammer | — | 2018-04-10 |