An ultrasonic treatment apparatus comprises a hand piece, and an RF power supply unit. The hand piece includes vibrator cover, a sheath connected thereto, a hollow cylindrical member, an ultrasonic vibrator in the cover for generating ultrasonic vibrations, a probe arranged in the sheath, for externally...http://www.google.se/patents/US5211625?utm_source=gb-gplus-sharePatent US5211625 - Ultrasonic treatment apparatus
