An ultrasonic treatment appliance according to the present invention comprises a handpiece with a built-in ultrasonic transducer, and an elongated probe extending forward from the handpiece and connected to the ultrasonic transducer in order to propagate ultrasonic vibrations. The ultrasonic treatment...http://www.google.de/patents/US6129735?utm_source=gb-gplus-sharePatent US6129735 - Ultrasonic treatment appliance
