An instrument for stapling body tissue including a staple, a retainer, and a plunger. The staple is preformed in a closed state and is made of a body-compatible material. The staple material has a stress plateau such that the staple may be flexed to an open state without permanent deformation. The retainer...http://www.google.se/patents/US5044540?utm_source=gb-gplus-sharePatent US5044540 - Surgical stapling instrument
