Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7175189 | Booster axle pivot mount | — | 2007-02-13 |
| 6938716 | Concrete mixing truck anti-rollover system | — | 2005-09-06 |
| 6719118 | Fold-over chute safety device | Charles P. Schumacher | 2004-04-13 |
| 6604765 | Rear under-ride protection device | — | 2003-08-12 |