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| Number | Title | Issue Date |
| 4538524 | Equalization means for a railway truck A railway truck includes a pair of pivotable side frames connected by a pivot assembly which maintains the side frames in tram while still permitting equalization. Springs are connected between a car body and the side frames to provide equalization for th... | 09/03/1985 |
| 3941063 | Truck side frame and bolster connection A freight car truck side frame-bolster connection which provides self-squaring or self-tramming forces by resilient means incorporated in bearing shoes that cooperate with the bolster ends and the side frame window opening to produce the desired results. ... | 03/02/1976 |
