Apparatus for applying energy to the outside of the skin for penetrating the skin, a transducer for converting the energy penetrating the skin to a form of energy utilizable by a device implanted in the body, and a member for transmitting the skin penetrating energy to the transducer. Preferably the...http://www.google.de/patents/US4432363?utm_source=gb-gplus-sharePatent US4432363 - Apparatus for transmitting energy to a device implanted in a living body
