Issued Patents All Time
Showing 101–108 of 108 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346026 | Rolling cone bit with shear cutting gage | Danny E. Scott | 1994-09-13 |
| 5323865 | Earth-boring bit with an advantageous insert cutting structure | Matthew R. Isbell, Robert E. Grimes | 1994-06-28 |
| 5311958 | Earth-boring bit with an advantageous cutting structure | Matthew R. Isbell | 1994-05-17 |
| RE34526 | Two cone bit with non-opposite cones | — | 1994-02-01 |
| 4984643 | Anti-balling earth boring bit | Matthew R. Isbell | 1991-01-15 |
| 4953641 | Two cone bit with non-opposite cones | — | 1990-09-04 |
| 4759415 | Rock bit with improved extended nozzle | — | 1988-07-26 |
| 4441566 | Drill bit with dispersed cutter inserts | Rodolfo M. Ippolito, Billy E. Baker | 1984-04-10 |