A multiple antenna ablation apparatus includes an electromagnetic energy source, a trocar including a distal end, and a hollow lumen extending along a longitudinal axis of the trocar, and a multiple antenna ablation device with three or more antennas. The antennas are initially positioned in...http://www.google.com/patents/US5728143?utm_source=gb-gplus-sharePatent US5728143 - Multiple antenna ablation apparatus and method
