A photograph mount comprising a frame and cover hinged thereto along one edge so that by disposing the cover at an angle to the frame, the structure may set upright on the lower edges of the frame and cover and wherein the frame comprises a back board, an intermediate board coextensive therewith and...http://www.google.fr/patents/US4275517?utm_source=gb-gplus-shareBrevet US4275517 - Photograph mount
