Original hardware trade vintage catalog for SOSS MANUFACTURING COMPANY, INC of Rosell, NJ. Manufacturers of Invisible Door Hinges. Eliminates all sag to a door, no matter how heavy or large. Used in buildings, folding partitions, secret panels, cupboards, closets, cabinets and furniture. Disbound from a large 1941 construction materials book, this unique old one page technical specification brochure would display beautifully matted and framed. A marvelous addition to your retro industrial design and engineering library.