An ultrasonic liquid delivery device has an elongate housing with an internal chamber, an inlet in fluid communication with the internal chamber of the housing, and an outlet in fluid communication with the internal chamber of the housing. An elongate ultrasonic waveguide is disposed at least in part...http://www.google.com.au/patents/US7810743?utm_source=gb-gplus-sharePatent US7810743 - Ultrasonic liquid delivery device
