Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6860293 | Variable pressure solenoid control valve | John Michael Douglass | 2005-03-01 |
| 6644350 | Variable pressure solenoid control valve | John Michael Douglass | 2003-11-11 |
| 6276663 | Normally rising variable force solenoid | David L. Anderson | 2001-08-21 |