Abstract: A portable sales promotion apparatus for electronic systems comprises electronic control modules and electronic output devices that are transported from the retailer's supply storeroom to the outside site of the customer's parked mobile vehicle where they are placed in the passenger area of the: vehicle for demonstrations of system performance, for experimental determination of any modifications required of the vehicle for installation of the system, and for the subjective evaluation of the customer or occupant of the vehicle prior to execution of a contract for purchase of a system to be installed. The demonstration vehicle, operable by the salesperson, is a roll-about cabinet that houses supporting electronic modules of the systems being demonstrated, an independent power supply, and control accessories subject to operation by the salesperson for conductiong the demonstrations.

Abstract: The cart of the present invention is used to transport planar materials such as plywood and drywall through a person size doorway. The transported material is in an upright position supported by a removable vertical side support on a planar elongated frame. The planar elongated frame is larger in the center and tapers inwardly at each end to about half its central width. The central portion of the cart has two large wheels on a transverse axle while the tapered ends each have central casters. The removable vertical side support has three receivers in the upper surface of the planar elongated frame. One of each of the three members of the vertical side support is received in each of the middle and tapered end sections, respectively. The three members meet and form an arched shape with an off-set central member.