Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729579 | Axle lift mechanism with spring cup wear plate | William C. Pierce | 1988-03-08 |
| 4726571 | Height control valve with spring return actuator | John P. Smith | 1988-02-23 |
| 4634141 | Axle lift mechanism | William C. Pierce | 1987-01-06 |