Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6843333 | Impregnated rotary drag bit | Volker Richert, Van Jordan Brackin, Matthew R. Isbell, M. MacLean Price | 2005-01-18 |
| 6510906 | Impregnated bit with PDC cutters in cone area | Volker Richert, Van Jordan Brackin, Matthew R. Isbell | 2003-01-28 |
| 6397958 | Reaming apparatus and method with ability to drill out cement and float equipment in casing | Christopher S. Charles, William Gregory Presley, Sean K. Berzas, Mark W. Dykstra, Mark E. Morris +2 more | 2002-06-04 |