Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8057135 | Auger bit with interlocking feed screw and cutting insert | Peter Czyzewski | 2011-11-15 |
| 8029215 | Spiral drill bit and method of forming same | Charles L. Gentry | 2011-10-04 |