The dilatation balloon assmebly comprises a catheter having a proximal end, a distal end and a distal end portion, the distal end portion having openings in the side wall thereof, and a dilatation balloon connected to and extending from the distal end of the catheter around and about the distal end portion...http://www.google.com.au/patents/US5037392?utm_source=gb-gplus-sharePatent US5037392 - Stent-implanting balloon assembly
