In the present invention, a cordless capacitively coupled electrosurgical instrument is adapted to receive electrosurgical energy from a specially designed trocar or trocar adapter. In one embodiment of the present invention, a capacitively coupled electrosurgical instrument includes a handle, an elongated...http://www.google.com/patents/US5951552?utm_source=gb-gplus-sharePatent US5951552 - Capacitively coupled cordless electrosurgical instrument
