A plug-assembled multi-shelf sectional display rack constituted of a plurality of horizontal and vertical hollow sections joined together at their ends by corner junctions having vertically and horizontally extending plugs engageable within the hollows of the sections. Each section is provided with a...http://www.google.es/patents/US4419938?utm_source=gb-gplus-sharePatente US4419938 - Plug-assembled sectional display rack
