Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793589 | Piston valve with proportional solenoid controlled pilot valve | Dolan F. Blalock, John S. McSpadden | 1988-12-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793589 | Piston valve with proportional solenoid controlled pilot valve | Dolan F. Blalock, John S. McSpadden | 1988-12-27 |