Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4815342 | Method for modeling and building drill bits | James F. Brett, Lawrence Allen Sinor | 1989-03-28 |
| 4721172 | Apparatus for controlling the force applied to a drill bit while drilling | J. Ford Brett, Warren J. Winters | 1988-01-26 |
| 4705117 | Method and apparatus for reducing drill bit wear | Warren J. Winters, J. Ford Brett | 1987-11-10 |
| 4660656 | Method and apparatus for controlling the rotational torque of a drill bit | Warren J. Winters, J. Ford Brett | 1987-04-28 |
| 4655303 | Drill bit | Warren J. Winters, J. Ford Brett | 1987-04-07 |