Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884511 | Aluminum hopper car with cast collars interconnecting intersecting center sill hood with ridge hood and sloped end walls | Keith J. Hallam | 1989-12-05 |
| 4813359 | Single axle railroad truck with frame improvements | Walter J. Marulic | 1989-03-21 |