A surgical end effector includes an anvil movable between a first position and a second position, the anvil having a concave anvil surface, and a convex mating surface. The anvil clamps a tissue structure between the anvil surface and the mating surface when in the second position, and wherein the mating...http://www.google.com.au/patents/US20050096670?utm_source=gb-gplus-sharePatent US20050096670 - Surgical end effector
