The invention provides an attachment member for anchoring a graft system at a desired location in a vessel of a patient's vascular system. The attachment member comprises a cranial zone having a first radial strength, a caudal zone having a second radial strength, and an intermediate zone having multiple...http://www.google.fr/patents/US6273909?utm_source=gb-gplus-shareBrevet US6273909 - Endovascular graft system
