Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5738336 | Oilfield valve | Devereux J. McKnight, James A. Cunningham | 1998-04-14 |
| 5628493 | Oilfield valve | Devereux J. McKnight, James A. Cunningham | 1997-05-13 |
| 5529285 | Oilfield valve | Devereux J. McKnight, James A. Cunningham | 1996-06-25 |
| 5246203 | Oilfield valve | Devereux J. McKnight, James A. Cunningham | 1993-09-21 |