Apparatus for refrigerating, drying and ventilating, namely, refrigerators, [ clothes dryers, ] air conditioners, Electric fans, [ Electric fans for household purposes, Portable electric fans, ] Ventilating exhaust fans, Ventilating fans [ for household, ] commercial and industrial use, Diffusers for ventilating fans for industrial and commercial use, Ventilating, high-velocity fixed exhaust fans for commercial, industrial and agricultural use, Ventilating, high-velocity portable exhaust fans...