An endoscopic instrument system which includes a handle portion with a scissors grip, a shaft extending from the scissors grip and shaped to extend through a cannula, and a plurality of disposable end tools, each mountable on and removable from the end of the shaft by hand without tools and actuatable...http://www.google.de/patents/US5618303?utm_source=gb-gplus-sharePatent US5618303 - Endoscopic instrument system and method
