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| Number | Title | Issue Date |
| 4856804 | Self unloading multiple trailer arrangement In a trailer train combination having a tractor, lead trailer and one or two more following trailers, an adjustable dolly under the front end of each following trailer provides for close coupling of the multiple trailers in end to end contact. Then the mu... | 08/15/1989 |
| 4738462 | Tool for moving a fifth wheel A tool for adjusting the position of a fifth wheel upon a tractor trailer assembly, in which a leverage arm is provided in combination with a pivotally mounted push and pull bar. The leverage arm is pivotally secured to a first mounting platform and exten... | 04/19/1988 |
| 4580806 | Pneumatic suspension system A vibration isolation suspension system comprises a support plate mounted on a main support plate on the spaced parallel frame members of a truck tractor. The support plate is mounted on a transverse pivotal axis located near the forward end of the tracto... | 04/08/1986 |
| 3950011 | Trailer truck A trailer truck comprising a trailer mounted at its front on the rear of a chassis frame of a tractor and energy absorbing system located between the chassis frame and a coupler of the trailer and adapted to allow an upward or forward movement of the coup... | 04/13/1976 |
