An endoscopic surgical instrument is provided which includes a handle portion and an elongated endoscopic portion. The endoscopic portion has a fixed inner tubular section which depends from the handle portion, and an outer tubular section mounted for coaxial reciprocating movement with respect to the...http://www.google.de/patents/US5417203?utm_source=gb-gplus-sharePatent US5417203 - Articulating endoscopic surgical apparatus
