The subject of the present invention is an implantable device intended to reestablish or maintain the normal passage cross section of a bodily canal, of the type comprising an elongate framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state...http://www.google.co.uk/patents/US6059808?utm_source=gb-gplus-sharePatent US6059808 - Implantable device and delivery system to reestablish or maintain a bodily canal
