Valvular Conduit 133 0 Download here USA108 - US1329559 Print Rate this article: No rating No.USA108Patent1,329,559Year1920CountryUnited States of AmericaDate of ApplicationFebruary 3, 1920Patent TitleValvular Conduit Documents to download USA108 - US1329559 (.pdf, 469.16 KB) - 160 download(s)