Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6659207 | Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability | Carl M. Hoffmaster | 2003-12-09 |
| 6609580 | Polycrystalline diamond compact insert reaming tool | — | 2003-08-26 |