73815145
Jul 27, 1989
Mar 10, 1992
INDUSTRIAL ELECTRIC HEATING ELEMENTS; IMMERSION HEATERS; CIRCULATION HEATERS FOR LIQUIDS, AIR, STEAM AND OTHER GASES FOR INDUSTRIAL AND COMMERCIAL USE; EXPLOSION PROOF ELECTRIC HEATERS; FLUID HEAT TRANSFER UNITS FOR COMMERCIAL AND INDUSTRIAL USE; ELECTRIC STEAM BOILERS; INFRARED HEATERS AND OVENS, BENCH OVENS; PROCESS AIR ELECTRIC HEATERS; ELECTRIC SPACE HEATERS; ELECTRIC FOOD WARMERS; ELECTRIC HOT PLATES, BROILERS, AND RANGE HEATING ELEMENTS AND SURFACES FOR COMMERCIAL AND DOMESTIC USE; SOFT METAL MELTERS; ELECTRIC VAPORIZERS; AND PARTS THEREFOR
Environmental Control Apparatus