Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7007913 | Rotating blowout preventer with independent cooling circuits and thrust bearing | — | 2006-03-07 |
| 7004444 | Rotating blowout preventer with independent cooling circuits and thrust bearing | — | 2006-02-28 |
| 6749172 | Rotating blowout preventer with independent cooling circuits and thrust bearing | — | 2004-06-15 |
| 6554016 | Rotating blowout preventer with independent cooling circuits and thrust bearing | — | 2003-04-29 |
| 4306187 | Apparatus for visually monitoring ignition voltages | — | 1981-12-15 |