U.S. federal trademark · Serial No. 73652317
BELLOWS TO COVER LARGE OPENINGS CONSTRUCTED IN BUILDING ROOFS AND WALLS TO ALLOW FOR SEISMIC AND OTHER MOVEMENT; FLEXIBLE CLOSURES TO WEATHERPROOF PENETRATIONS THROUGH TO ROOFS AND WALLS BY DUCTS, VENTS, CONVEYORS, INTERBUILDING WALKWAYS; AND FIRE-RESISTANT CLOSURES USING A SILICONE IMPREGNATED WOVEN FIBER GLASS BELLOWS
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