5245692 Portable hemispheric electric space heater with circumferential filtered warm air discharge 1993-09-14 Kawai 392/364 5077825 Space heater mounted to ceiling fan 1991-12-31 Monrose 4782213 Ceiling fan electrically heating environmental air 1988-11-01 Teal 392/362 4694142 Electric air heater 19...