Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5168931 | Fluid control valve | Kenneth D. Caskey | 1992-12-08 |
| 4696344 | Annulus pressure operated ratchet device | Robert T. Evans | 1987-09-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5168931 | Fluid control valve | Kenneth D. Caskey | 1992-12-08 |
| 4696344 | Annulus pressure operated ratchet device | Robert T. Evans | 1987-09-29 |