Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6142248 | Reduced erosion nozzle system and method for the use of drill bits to reduce erosion | Gary M. Thigpen, Coy M. Fielder, Brad Weston | 2000-11-07 |
| 5992548 | Bi-center bit with oppositely disposed cutting surfaces | Roger Silva, Brad Weston, Coy M. Fielder | 1999-11-30 |