End effector scissor elements for laparoscopic surgical instruments are provided in the form of investment case cobalt base alloy elements. The cobalt base alloy scissor elements are homogeneous in composition. Each element has in its as-cast form an elongate portion having an integral cutting edge....http://www.google.ca/patents/US5531755?utm_source=gb-gplus-sharePatent US5531755 - Cobalt base alloy end effectors for laparoscopic surgical scissors
