Patents by Inventor David A. Sonstegard

David A. Sonstegard 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).

  • Patellar flange and femoral knee-joint prosthesis
    Patent number: 4353135
    Abstract: A patellar flange for a knee joint prosthesis comprising a curved base and a pair of condylar runners, one of said condylar runners being attached to each lateral side of the base and extending outwardly anteriorly therefrom diverging from each other and converging to the base superiorly and a femoral knee joint prosthesis containing the flange.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: October 12, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Mark R. Forte, David A. Sonstegard