A rigid one piece two compartmented container to provide an easily transportable and sanitary diaper changing surface for infants. The device has a one piece rectangular flat based tray having two adjoining sections, one section has angled sides and a flat base surface to hold an infant during the diaper...http://www.google.co.uk/patents/US4522381?utm_source=gb-gplus-sharePatent US4522381 - One piece sanitary diaper changing station
