Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11767715 | Underreamer | George Fyfe | 2023-09-26 |
| 7140448 | Stepped polycrystalline diamond compact insert | Johnny Castle | 2006-11-28 |
| 7025155 | Rock bit with channel structure for retaining cutter segments | — | 2006-04-11 |
| 6904984 | Stepped polycrystalline diamond compact insert | Jack Castle | 2005-06-14 |
| 6902014 | Roller cone bi-center bit | — | 2005-06-07 |
| 6745858 | Adjustable earth boring device | — | 2004-06-08 |
| 6435287 | Sharp gage for mill tooth rock bits | — | 2002-08-20 |
| 6186250 | Sharp gage for mill tooth rockbits | — | 2001-02-13 |
| 6167975 | One cone rotary drill bit featuring enhanced grooves | — | 2001-01-02 |
| 5454437 | Roller cone core bit | — | 1995-10-03 |
| 5244050 | Rock bit with offset tool port | — | 1993-09-14 |
| 5197555 | Rock bit with vectored inserts | — | 1993-03-30 |
| 5145016 | Rock bit with reaming rows | — | 1992-09-08 |
| 5145017 | Kerf-cutting apparatus for increased drilling rates | Jesse L. Holster, Jack Castle, Paul G. Parys | 1992-09-08 |
| 5074367 | Rock bit with improved shank protection | — | 1991-12-24 |
| 4911252 | Rock bit loose cone indicator | — | 1990-03-27 |
| 4730681 | Rock bit cone lock and method | — | 1988-03-15 |
| 4537409 | Radial rock bit seal | Beaumont B. Wright | 1985-08-27 |