Improves bipolar electrode probe devices for use in electrocautery and electrocoagulation include a central electrode having an outer electrode coaxially disposed therearound. The central and outer electrodes are electrically insulated from each other and are adapted to receive a high frequency voltage...http://www.google.com/patents/US4674499?utm_source=gb-gplus-sharePatent US4674499 - Coaxial bipolar probe
