Importance

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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. The left and right side walls have at least one U-shaped leg member extending downwardly therefrom beyond the bottom horizontal member. The leg members are adapted for hooking engagement with one of the crossbars of one of the left and right side walls of a lower shelf unit upon which the shelf unit is placed to releasably secure the shelf unit atop the lower shelf unit.

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First Claim