Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8757267 | Pressure range delimited valve with close assist | Bruce Mitchell | 2014-06-24 |
| 7331392 | Pressure range delimited valve | Bruce Mitchell | 2008-02-19 |
| 6907926 | Open well plunger-actuated gas lift valve and method of use | — | 2005-06-21 |
| 6705404 | Open well plunger-actuated gas lift valve and method of use | — | 2004-03-16 |