Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4677917 | High volume covered hopper car with loading from below and automatic unloading | Richard H. Dugge | 1987-07-07 |
| 4422532 | Hand brake mechanism including force dividing assembly | James C. Hammonds, Frederick E. Vorwerk | 1983-12-27 |
| 4315465 | Constant contact side bearing for articulated rail cars | Frederick E. Vorwerk | 1982-02-16 |