Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10876359 | Multi-accumulator arrangement for hydraulic percussion mechanism | Joseph Purcell | 2020-12-29 |
| 10808476 | Drill rod for percussion drill tool | Joseph Purcell, Hongbin Wang | 2020-10-20 |