Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10472031 | Personal flotation device | Melissa Siladji | 2019-11-12 |
| 6883618 | Variable timing for front chamber of pneumatic hammer | — | 2005-04-26 |
| 6698537 | Bit retention system | Dennis J. Dugas | 2004-03-02 |
| 6070678 | Bit retention system | — | 2000-06-06 |
| 6021856 | Bit retention system | — | 2000-02-08 |
| 5992537 | Back end connection in a downhole drill | — | 1999-11-30 |
| 5984021 | Porting system for back chamber of pneumatic hammer | — | 1999-11-16 |
| 5205363 | Porting system for pneumatic impact hammer | — | 1993-04-27 |
| 4962822 | Downhole drill bit and bit coupling | — | 1990-10-16 |
| 4919221 | Impact drill bit assembly and replaceable parts thereof | — | 1990-04-24 |