Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6598689 | Roller cone for drill bit having improved resistance to fatigue cracking | Robert H. Slaughter, Jr. | 2003-07-29 |
| 6408957 | Sealed bearing roller cone bit having anti-plugging device | Robert H. Slaughter, Jr., Peter Thomas Cariveau, Vincent Shotton, Roger Didericksen | 2002-06-25 |