An apparatus is provided for diffusing aroma therapy oils which allows the user to pre-select a variety of aromas to be introduced at predetermined time intervals so that different moods or state of minds may be created. The apparatus includes a tray having a plurality of receptacles for various...http://www.google.fr/patents/US5805768?utm_source=gb-gplus-shareBrevet US5805768 - Aroma therapy diffuser
