Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4780274 | Manufacture of rotary drill bits | — | 1988-10-25 |
| 4733735 | Rotary drill bits | John M. Fuller, Malcolm R. Taylor | 1988-03-29 |
| 4727946 | Rotary drill bits | Terry R. Matthias | 1988-03-01 |
| 4711144 | Drill bit and method of manufacture | Haydn R. Lamb | 1987-12-08 |
| 4697654 | Rotary drill bits | Malcolm R. Taylor | 1987-10-06 |
| 4694919 | Rotary drill bits with nozzle former and method of manufacturing | — | 1987-09-22 |
| 4679639 | Rotary drill bits and cutting elements for such bits | Michael Wardley | 1987-07-14 |
| 4676324 | Drill bit and cutter therefor | John M. Fuller | 1987-06-30 |
| 4669556 | Drill bit and cutter therefor | Terry R. Matthias, Malcolm R. Taylor | 1987-06-02 |
| 4660659 | Drag type drill bit | Lot William Short, Jr. | 1987-04-28 |
| 4640375 | Drill bit and cutter therefor | John M. Fuller | 1987-02-03 |
| 4624830 | Manufacture of rotary drill bits | — | 1986-11-25 |
| 4605157 | Drill bit manufacturing method | Haydn R. Lamb | 1986-08-12 |
| 4593777 | Drag bit and cutters | — | 1986-06-10 |
| 4577706 | Rotary drill bits | — | 1986-03-25 |
| 4570725 | Drill bit cutter | Terry R. Matthias | 1986-02-18 |
| 4558753 | Drag bit and cutters | — | 1985-12-17 |
| 4505342 | Drill bit | John M. Fuller | 1985-03-19 |
| 4382477 | Rotary drill bits | — | 1983-05-10 |