73101877
Oct 4, 1976
Nov 13, 1979
STEAM HEATING UNITS; GAS OR OIL FIRED TWO-STAGE GENERATING ABSORPTION CHILLER-HEATERS; AIR OR WATER COOLED RECIPROCATING WATER CHILLERS; CENTRIFUGAL, SCREW-TYPE AND ABSORPTION REFRIGERATING UNITS; VERTICAL OR HORIZONTAL FAN COIL UNITS; AIR CONDITIONING UNITS; REFRIGERATED DISPLAY CASES; HERMETIC, SEMI-HERMETIC AND OPEN-TYPE REFRIGERATING COMPRESSORS; REFRIGERATION CONDENSING UNITS; FLOOR OR WALL MOUNTED HOT AIR HEATERS; BOILERS-NAMELY, STEAM SUPERHEATERS, STEAM RE-SUPERHEATERS, AIR PREHEATERS, FEED WATER HEATERS, AND PARTS AND FITTINGS THEREFOR; HEAT EXCHANGE PIPES AND PIPE FITTINGS FOR HEATING AND COOLING
Environmental Control Apparatus