A self-contained air conditioning unit for headwear of substantially any type comprising an electric motor and fan removably secured within a lightweight housing, said motor being secured to an air inlet screen removably securable to the headwear, a power supply holder means supporting suitable power...http://www.google.es/patents/US4238857?utm_source=gb-gplus-sharePatente US4238857 - Self-contained air conditioning unit for persons
