Patents by Inventor Stefan Ringgenburger

Stefan Ringgenburger 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).

  • Suction cannula
    Patent number: D912243
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: March 2, 2021
    Assignee: KARL STORZ SE & CO. KG
    Inventors: Mathias Stengele, Stefan Ringgenburger, Andreas Efinger
  • Suction cannula
    Patent number: D917041
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: April 20, 2021
    Assignee: KARL STORZ SE & CO. KG
    Inventors: Mathias Stengele, Stefan Ringgenburger, Andreas Efinger