Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9085209 | Multiple axle equalizing rubber suspension (ERT) | Ervin K. VanDenberg, David H. Croston | 2015-07-21 |
| 9039034 | Multiple axle equalizing rubber suspension | Ervin K. VanDenberg, David H. Croston | 2015-05-26 |
| 7516821 | Brake system and suspension for use therewith | — | 2009-04-14 |
| 7137487 | Brake system and suspension for use therewith | — | 2006-11-21 |