| http://www.w3.org/ns/prov#value | - The combination of claim 5 in which the cannula is a radiopaque vinyl plastic and the catheter is at least partially radiopaque. t t t Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2024982 *Dec 19, 1934Dec 17, 1935Harry C ScottSurgical instrumentUS2688329 *Mar 19, 1953Sep 7, 1954American Cystoscope Makers IncCatheterUS2701559 *Aug 2, 1951Feb 8, 1955Cooper William AApparatu
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