A device (10) for treatment of obesity of a patient comprises an annular element (12) having a relatively large outer boundary and a relatively small inner boundary, and an elongated flexible tube (14) extending from the relatively small inner boundary of the annular element to a distal end. The relatively...http://www.google.es/patents/US7316716?utm_source=gb-gplus-sharePatente US7316716 - Gastric bypass prosthesis
