A combination soft body tissue stimulator and heating device including two thin, flat, multi-layered flexible pads, each formed as a unit, one side of which defines a working surface. The working surface of each pad is defined by a very thin conductive foil layer which, when properly installed, makes...http://www.google.es/patents/US6021348?utm_source=gb-gplus-sharePatente US6021348 - Stimulation and heating device
