In the present invention, a cordless inductively coupled electrosurgical instrument is adapted to receive electrosurgical energy from a specially designed trocar or trocar adapter. In one embodiment of the present invention, an electrosurgical instrument includes a handle, an elongated tube and an electrosurgical...http://www.google.fr/patents/US6371967?utm_source=gb-gplus-shareBrevet US6371967 - Inductively coupled electrosurgical instrument
