72337911
Sep 15, 1969
Apr 11, 1972
[ AIR HANDLING TROFFERS; ] HEAT TRANSFER MEANS; NAMELY, ELECTRICAL IMMERSION ELEMENTS, CIRCULATION HEATERS, WATER BOILERS, DRUM HEATERS, STEAM BOILERS, STEAM SUPERHEATERS, STRIP, RING, DISC, TUBULAR, CARTRIDGE AND CLAMP-ON HEATING ELEMENTS, HEATER BANDS, NOZZLE ELEMENTS, INFRARED HEATERS, HEATING CABLE, TRACK SWITCH HEATERS, STUD AND BOLT HEATERS, WELDING PREHEATERS, OVEN HEATERS, AND FOOD TABLE HEATERS; WELDERS; ELECTRIC APPARATUS FOR HEATING, CIRCULATING, BLOWING, FILTERS, AND DEHUMIDIFYING AIR; AND PARTS THEREFOR; NAMELY, RADIANT HEATERS, INFRARED HEATERS, BLOWER TYPE ELECTRIC HEATERS, ELECTRIC AIR HEATERS, WALL MOUNTED AIR HEATERS, CONVECTION TYPE AIR HEATERS, BASEBOARD HEATERS, FINNED DUCT TYPE AIR HEATERS, FINNED ELECTRIC AIR HEATING ELEMENTS, ELECTRIC BLOWERS, [ VENTILATING HOODS WITH AND WITHOUT FILTERS, ] EXHAUST FANS, ELECTRIC HOT AIR FURNACES, AND OIL BURNER CONTROLS
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