73730724
May 25, 1988
Jul 25, 1989
[ PREFABRICATED STRUCTURAL ELEMENTS, NAMELY, COLUMNS, BEAMS AND OUTER WALL PANELS ESPECIALLY FOR INDUSTRIAL PLANTS AND OFFICE BUILDINGS ]
Metal Goods[ SEPARATION WALLS, CEILING PANELS FOR SOUND ABSORBING, AIR CONDITIONING, AND LIGHTING PURPOSES; LOAD CARRYING FLOOR PANELS AND OVERHEAD LIGHTS FOR CEILINGS ]
Nonmetallic Building Materials