Filed: January 14, 1970 ENGINEERING SERVICES RELATING TO THE CONSTRUCTION OF ROADS, COMMERCIAL BUILDINGS AND PREFABRICATED HOUSES Owned by:YTONG AB Serial Number:72348600
Filed: January 14, 1970 POROUS LIGHTWEIGHT BUILDING BLOCKS, SLABS, AND PREFABRICATED WALL AND CEILING UNITS, COMPRISED OF LIMESTONE AND SILICA MATERIALS… Owned by:YTONG AB Serial Number:72348601