An improved air ionizing apparatus that may be used as part of an air filtering system. The apparatus consists of an air passageway with at least one negatively charged ionizing member therein and a conductive strip, positively charged with respect to the ionizing member extending around at least a major...http://www.google.es/patents/US5407469?utm_source=gb-gplus-sharePatente US5407469 - Improved air ionizing apparatus
