Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6450271 | Surface modifications for rotary drill bits | Gordon A. Tibbitts, Danny E. Scott, Terry J. Kolterman, Chih Lin, James Andy Oxford +1 more | 2002-09-17 |
| 6374704 | Steel-tooth bit with improved toughness | Danny E. Scott, Anton F. Zahradnik | 2002-04-23 |
| 6371225 | Drill bit and surface treatment for tungsten carbide insert | Anil Kumar | 2002-04-16 |
| 6360832 | Hardfacing with multiple grade layers | Ronald L. Jones, Alan J. Massey, Mary K. Adams | 2002-03-26 |