Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7201360 | Pneumatic device having a selectively variable orifice | Barry L. Gaarder, Jack Tan | 2007-04-10 |
| 6905108 | Control valve flow adjustment device | Randy Hall, Mark Stiehl, Brian J. Burlage, Carter B. Cartwright | 2005-06-14 |
| 6889702 | Replaceable valve seat ring with enhanced flow design | Randy Hall, Carl D. Miller | 2005-05-10 |
| 6769666 | Variable port valve plug | Randy Hall | 2004-08-03 |
| 6698449 | Replaceable valve seat ring with enhanced flow design | Randy Hall, Mark Stiehl, Carl D. Miller | 2004-03-02 |
| 6695000 | Control valve pressure bleed inspection port | Randy Hall, Mark Stiehl | 2004-02-24 |