Abstract: A trailer assembly comprises spaced wheels connected by an axle, an elongate tow bar assembly projecting forwardly from the axle, and a load carrying frame pivotally mounted on the axle for movement between an upright, ground position for loading and unloading, a first towing position in which the frame is inclined forwardly, and a second towing position in which the frame is horizontal. First and second latching mechanisms are provided for releasably latching the frame in the first and second towing positions, respectively.

Abstract: A towable dolly comprises a platform for supporting an object either alone or on a standard dolly, a wheel assembly pivotally secured to the forward end of the platform, and a lifting or tilting assembly for tilting the platform upwardly at its rear end relative to the wheel assembly so that it is raised from the ground in its towing position. A tow bar assembly projects forwardly from the wheel assembly for connection to a standard vehicle tow bar connector.

Abstract: A color changing display in which various elements and portions of the display are formed as shallow transparent pockets on a supporting back panel. Each pocket is connected in a closed fluid circuit to an individual reservoir containing a suitably colored fluid. Actuating mechanism is used to raise and lower each reservoir individually so that fluid can flow into or drain out of selected pockets in any desired sequence or timed program. The result, viewed from the front through the transparent pockets, has the appearance of a display building up in a particular sequence or changing color in various patterns.