Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6460631 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2002-10-08 |
| 6443249 | Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Mark W. Dykstra, Roger Fincher, Roland Illerhaus, Steve R. Matson, James A. Norris +2 more | 2002-09-03 |
| 6349780 | Drill bit with selectively-aggressive gage pads | — | 2002-02-26 |