Patents by Inventor David L. Yoon

David L. Yoon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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