An electrosurgical hemostatic instrument is provided in which the coagulation status of tissue engaged by two elements delivering an electrosurgical energy to tissue may be observed, and in which damage from thermal spread may be minimized. A preferred embodiment of the invention provides a...http://www.google.se/patents/US5674220?utm_source=gb-gplus-sharePatent US5674220 - Bipolar electrosurgical clamping device
