An endoluminal prosthesis having an unsupported or flexible region and a delivery system for delivering the endoluminal prosthesis is provided. The delivery system includes a prosthesis delivery catheter with stiffening elements that provide longitudinally rigid support to a flexible or unsupported portion...http://www.google.ca/patents/US7758626?utm_source=gb-gplus-sharePatent US7758626 - Device and method for delivering an endovascular stent-graft having a longitudinally unsupported portion
