A penile prosthesis (20) designed to be surgically implanted in the penis for the treatment of erectile impotence. The prosthesis comprises an articulated column (26) having alternating joints (56) enclosed with a switch (30) within an outer elongated sheath (28). The switch (30) is aligned for reversibly...http://www.google.es/patents/US4517967?utm_source=gb-gplus-sharePatente US4517967 - Penile prosthesis