Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5906375 | Rubber riveting of molded parts | Kenneth D. Young | 1999-05-25 |
| 5851013 | Blowout preventer packing element with metallic inserts | — | 1998-12-22 |
| 5713581 | Fibrous seal for blowout preventer | Douglas W. Carlson, William David Breach | 1998-02-03 |
| 5542454 | Free flow low energy pipe protector | Douglas W. Carlson | 1996-08-06 |
| 5405467 | Rubber riveting of molded parts | Kenneth D. Young | 1995-04-11 |
| 5364064 | Safety sub with asymmetrical wall elastomeric closure for retaining drilling fluids | Douglas W. Carlson | 1994-11-15 |
| 5180137 | Ram type blowout preventer having improved ram front packings | Douglas W. Carlson | 1993-01-19 |