Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5755297 | Rotary cone drill bit with integral stabilizers | John Randolph Young, Norman Gair Mitchell, Paul Ronald Riederer, Harry M. Campos, Jr. | 1998-05-26 |
| D384084 | Rotary cone drill bit | Harry M. Campos, Jr. | 1997-09-23 |
| 5624002 | Rotary drill bit | — | 1997-04-29 |
| 5606895 | Method for manufacture and rebuild a rotary drill bit | — | 1997-03-04 |
| 5595255 | Rotary cone drill bit with improved support arms | — | 1997-01-21 |
| 5553681 | Rotary cone drill bit with angled ramps | Harry M. Campos, Jr. | 1996-09-10 |
| D372253 | Support arm and rotary cone for modular drill bit | Harry M. Campos, Jr., Michael S. Beaton, Jay S. Bird | 1996-07-30 |
| 5439067 | Rock bit with enhanced fluid return area | — | 1995-08-08 |
| 5439068 | Modular rotary drill bit | Wesley P. Dietz | 1995-08-08 |
| 5421423 | Rotary cone drill bit with improved cutter insert | — | 1995-06-06 |
| 5291807 | Patterned hardfacing shapes on insert cutter cones | William D. Vanderford | 1994-03-08 |
| 4716977 | Specially shaped cutting element for earth boring apparatus | — | 1988-01-05 |