73119198
Mar 15, 1977
Sep 15, 1981
Frame Supported Stressed Membrane Buildings; Components Therefor-Namely, Straight and Curved Beams and Trusses, Base Plate Angles, Footing Plates, Bases, Pads, Butt Joint and Top Joint Splice Plates, Fabric Holding Caps, Spreaders, Ridge Cones, Fabric Panels, and Ground Anchors
Nonmetallic Building Materials