A system of adjustable interlockable panels for assembling a modular unit is provided, which comprises a plurality of rectangular, adjustable interlockable panels. Each panel has four edges: a first edge comprises a male sliding interlock, and a third, opposite edge comprises a female sliding interlock;...http://www.google.com.tw/patents/US6174116?utm_source=gb-gplus-share專利 US6174116 - Adjustable interlocking panels
