Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435288 | Rock drill bit | Mauro F. Dobran, Kerry C. Willett | 2002-08-20 |
| 5509477 | Borehole ventilation sealcover | — | 1996-04-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435288 | Rock drill bit | Mauro F. Dobran, Kerry C. Willett | 2002-08-20 |
| 5509477 | Borehole ventilation sealcover | — | 1996-04-23 |