An improved electrosurgical instrument for use with a specially adapted electrosurgical trocar. The improved electrosurgical instrument including a handle, an end effector and an elongated closure tube connecting the handle to the end effector. The elongated closure tube including one or more electrical...http://www.google.fr/patents/US5961514?utm_source=gb-gplus-shareBrevet US5961514 - Cordless electrosurgical instrument
