Modular display booth units are made from an upstanding bent sheet body portion located at its top and bottom in respective depending and upstanding lips of counter top and tray portions. Inside the body portions, rails extend from side to side. Hooked ends latch into latching apertures in the side wall...http://www.google.com/patents/US5405192?utm_source=gb-gplus-sharePatent US5405192 - Modular booth display assembly
