An artificial venous valve which incorporates a stent having one or more of the elements comprising its frame deformed inwardly towards its center and a biocompatible fabric attached to the one or more elements is utilized to replace or supplement incompetent or damaged venous valves. The elements are...http://www.google.co.uk/patents/US6503272?utm_source=gb-gplus-sharePatent US6503272 - Stent-based venous valves
