A ventilation system for a car window comprising a body housing 11, blocking plates A (13) and B (14'), and a plurality of airflow members (18, 19, 20, 21 and 55), wherein: the plurality of airflow members (18, 19, 20, 21, 55) are arranged in layers in an inner chamber following a ventilation opening...http://www.google.co.uk/patents/US6224479?utm_source=gb-gplus-sharePatent US6224479 - Ventilation system for car window
