Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11085242 | Pneumatic drilling with packer slideable along stem drill rod | Robert F. Vincent, David Timothy Flynn | 2021-08-10 |
| 7422074 | Delayed compression sleeve hammer | — | 2008-09-09 |