A puzzle box device (1) having a top lid (2) and a bottom (4) with sides (21) attached thereto, said sides connected by fixed corner pieces (5). The sides (21) contain a plurality of sliding panels (8), some with locking pins (10, 12) and some being spring-mounted panels (16). Depressing and sliding...http://www.google.de/patents/US5419558?utm_source=gb-gplus-sharePatent US5419558 - Puzzle box with hand tool
