An apparatus for tuning and controlling an ultrasonic handpiece having a programmable broad spectrum source, a torsional single frequency source and a longitudinal single frequency source that generate a drive signal for an ultrasonic handpiece and a digital signal processor for analyzing a response...http://www.google.es/patents/US6028387?utm_source=gb-gplus-sharePatente US6028387 - Ultrasonic handpiece tuning and controlling device
Ultrasonic handpiece tuning and controlling device
