prefabricated and portable sectional metallic building units and couplings, fittings, and connections therefor, sold as a unit, adapted to serve as framing and supporting members for temporary and permanent construction of buildings and other structures, including racks, scaffolding, ladders, rails, supports and the like

sectional metallic building units and couplings, fittings, and connections therefor, adapted to serve as framing and supporting members for temporary and permanent construction of buildings and other structures, including racks, scaffolding, ladders, rails, supports and the like

TELESCOPING COUNTERBALANCE FOR HINGED CLOSURES ON AUTOMOBILES