Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8056651 | Adaptive control concept for hybrid PDC/roller cone bits | Eric C. Sullivan | 2011-11-15 |
| 8006785 | Casing and liner drilling bits and reamers | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2011-08-30 |