A medical instrument includes a handpiece, an electromechanical transducer disposed in the handpiece, and an electrical circuit disposed at least partially in the handpiece for supplying alternating electrical current of a predetermined frequency to the transducer. A probe is operatively connected to...http://www.google.fr/patents/US7776027?utm_source=gb-gplus-shareBrevet US7776027 - Medical handpiece with automatic power switching means
Medical handpiece with automatic power switching means
