Patents by Inventor Frank E. Hartung

Frank E. Hartung 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).

  • Wind turbine
    Patent number: D909972
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: February 9, 2021
    Assignee: SP POWER FARM GROUP LTD.
    Inventors: Frank E. Hartung, Thomas B. Armstrong, Ronald Langner