Abstract: A control system for positioning a marker over a pre-existing roadway surface mark. The control system has one or more imagers having a field of view for imaging an area of roadway mark surface encompassing the roadway mark and a computer having a machine learning network to process the roadway mark image and position the marker over the pre-existing roadway mark.

Abstract: A shelf unit includes top and bottom, spaced, generally parallel and coextensive horizontal surfaces comprising a plurality of spaced, generally parallel and coextensive elongated horizontal members and a plurality of spaced, generally parallel and coextensive crossmembers extending generally perpendicularly to the elongated horizontal members. Left and right spaced, generally parallel and coextensive elongated vertical side walls comprise a plurality of spaced, generally parallel and coextensive vertical bars and a plurality of spaced, generally parallel and coextensive crossbars extending generally perpendicularly to the elongated vertical members. The upper and lower edges of the left and right side walls are secured to the outer edges of the top and bottom surfaces so that the left and right walls extend generally perpendicularly to the bottom and top surfaces to define a chamber.

Abstract: A merchandise display fixture of the type wherein a horizontal bar is supported between two or more spaced brackets extending forwardly from a supporting column which has its outer end bent to a generally U-shaped contour. The two leg portions of the U each have a vertical slot therein, these being directly opposite each other and are of a shape and dimension designed to snugly receive the horizontal bar to be supported. The base portion of the U-shaped end of the bracket has a cam element thereon arranged to bear against the outer face of the horizontal bar as it is forced downwardly into the opposed vertical slots and spring the edges of the slot into tight binding contact with the horizontal bar, holding it against longitudinal movement and requiring force to lift it from the slots.