Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4608931 | Filament wound railway hopper car | Douglas C. Ruhmann, James D. Mundloch, Frederick E. Vorwerk | 1986-09-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4608931 | Filament wound railway hopper car | Douglas C. Ruhmann, James D. Mundloch, Frederick E. Vorwerk | 1986-09-02 |