Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7422270 | Thin section sidewall assemblies for vans and trailers | Wolfgang Graaff | 2008-09-09 |
| 7258391 | Thin section sidewall assemblies for vans and trailers | Wolfgang Graaff | 2007-08-21 |
| 7011358 | Thin section sidewall assemblies for vans and trailers | Wolfgang Graaff | 2006-03-14 |
| 6652010 | Rear impact guard assembly for trailers | Timothy C. Gossett, Raymond D. Fox | 2003-11-25 |
| 6607237 | Thin section sidewall assemblies for vans and trailers | Wolfgang Graaff | 2003-08-19 |
| 5170605 | Refrigerator trailer floor construction | — | 1992-12-15 |
| 5028183 | Chain tie downs | Edward H. Niehaus | 1991-07-02 |