An embodiment of the present invention relates to a staircase device adapted to fit a bed of a truck, or other similar vehicle. The staircase provides a mechanism for facilitating the loading and unloading of items onto and off a bed of a truck. An embodiment of the present invention is directed to a vehicle staircase device comprising a first lower platform having a first length and a first width, the first lower platform having a hitch connector adapted to connect to a vehicle; a second platform having a second length and a second width, wherein the first lower platform and the second platform are substantially parallel; and a staircase structure connecting the first lower platform and the second platform.

 
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> Catheter having plurality of stiffening members

> Composite material, in particular composite membrane, and process for the production of the same

~ 00577