74308329
Aug 25, 1992
Jun 22, 1993
air conditioning units; ventilation fans for domestic, commercial and industrial use; housing and duct units with [ HEATNG ] * HEATING * , COOLING, AND HUMIDIFYING SECTIONS FOR DOMESTIC, COMMERCIAL AND INDUSTRIAL USE; INDUSTRIAL AND COMMERCIAL HEATERS COMPRISING AN ELECTRIC, GAS, OR HOT WATER HEAT SOURCE AND A HEAT EXCHANGER
Environmental Control Apparatus