There is disclosed a storage unit for interfitting with at least one like storage unit to form an assembly of said storage units, each of said storage units comprising a top section, a rear section, a pair of side sections and a bottom section, said sections being integrally connected to form a box-shaped...http://www.google.fr/patents/US4577914?utm_source=gb-gplus-shareBrevet US4577914 - Assembly of slidably interfitting storage units
