HUMBOLDT

Class [023]
Yarns and Threads

MACHINES AND DEVICES FOR MINERAL AND COAL DRESSING; [ FILTER PRESSES AND PRESS FILTERS, ROTARY FILTERS; BRIQUETTING MACHINES AND DEVICES FOR COAL, LIGNITE, ORES, AND OTHER MINERALS; ] DRYERS FOR SOLIDS; [ COOLING APPARATUS FOR DRIED LIGNITIC COAL; ] MINERAL CLASSIFIERS; [ THICKENING DEVICES FOR MUD-CONTAINING WATER; ] SETTLING MACHINES; FLOATATION APPARATUS; MAGNETIC SEPARATORS AND MAGNETIC SEPARATOR DRUMS; PURIFYING APPARATUS FOR MINERALS; [ BRIQUETTE-DISCHARGING MACHINES; CENTRIFUGAL PUMPS, ] KILNS AND APPARATUS FOR BURNING LIME AND GYPSUM; CALCINING FURNACES; [ CARBONIZING FURNACES; CONVERTERS; FLAME FURNACES; LYE DRUMS; ] SETTLING DRUMS; [ STRUCTURAL STEEL COMPONENTS FOR BUILDINGS, ROAD BRIDGES, AND RAILROAD BRIDGES; HOIST SUPERSTRUCTURES; ] VESSELS AND BINS OF STEEL; MECHANICAL REDUCING MACHINES AND APPARATUS; GRINDING MILLS, [ KNEADING AND MIXING MACHINES; ] AIR-BLAST SEPARATORS [ ; APPARATUS FOR THE CHEMICAL INDUSTRY INCLUDING SUCTION GAS GENERATORS, BLOWERS, CHAIN AND CABLE CONVEYORS, CUPOLA FURNACES, TOWER-TYPE TANKS, ZINC-MELTING PANS; APPARATUS FOR THE SUGAR INDUSTRY INCLUDING CONVEYORS AND LOADERS, BUCKET CONVEYORS, CAR-TILTING DEVICES, CONVEYOR PLANTS; METALLURGICAL EQUIPMENT INCLUDING SHAFT FURNACES, WATER-JACKET FURNACES, APPARATUS FOR METAL-REFINING PLANTS; APPARATUS FOR PROCESSING OF COMMERCIAL LEAD; ELECTRIC MELTING FURNACES; MECHANICAL ROASTING FURNACES ]