Patents Assigned to William W. Angell
  • Heart valve stent and process for preparing a stented heart valve prosthesis
    Patent number: 4035849
    Abstract: An anatomically configured stent for a tanned, expanded natural tissue heart valve, a valve prosthesis including the stent, and a process for preparing the prosthesis are disclosed. The stent comprises a frame having three struts, two of which are biased radially inwardly and the third of which is also biased radially inwardly or generally parallel to the frame axis and a fabric cover covering at least the exterior of the frame, the cover having a bead along its perimeter that provides a site for attachment of the valve to the stent.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: July 19, 1977
    Assignee: William W. Angell
    Inventors: William W. Angell, David L. Yoon
  • Heart valve stent
    Patent number: 3983581
    Abstract: An anatomically configured stent for a tanned, expanded natural tissue heart valve and a valve prosthesis including the stent are disclosed. The stent comprises a frame whose interior configuration is the anatomical negative of the exterior configuration of a tanned, expanded, natural tissue valve and a fabric cover covering at least the exterior of the frame, the cover having a bead along its perimeter that provides a site for attachment of the valve to the stent.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: October 5, 1976
    Assignee: William W. Angell
    Inventors: William W. Angell, David L. Yoon