An electrosurgical unit which combines an electrosurgical power generator and a filtered smoke removal system into a single compact instrument comprising an electrosurgical generator module and a smoke removal module. The electrosurgical generator module is designed specifically to accommodate an electrosurgical...http://www.google.se/patents/US5160334?utm_source=gb-gplus-sharePatent US5160334 - Electrosurgical generator and suction apparatus
