Patents Assigned to Dr. Eduard Fresenius Chemisch-Pharmazeutishe Industry KG
  • Catheter with radiographic contrast strips
    Patent number: 4447239
    Abstract: A catheter is provided with a first radiographic contrast strip extending helically on or in the catheter wall with a constant pitch and a second such strip which is either disposed on a longitudinal generatrix of said wall to intersect said first strip once per convolution thereof or extends helically at the same constant pitch but in the opposite direction to intersect said first strip twice per convolution on respective opposite longitudinal generatrices.
    Type: Grant
    Filed: May 5, 1982
    Date of Patent: May 8, 1984
    Assignee: Dr. Eduard Fresenius Chemisch-Pharmazeutishe Industry KG
    Inventor: Victor Krutten