Patents by Inventor John F. Semrau

John F. Semrau 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).

  • Tornado Warning System
    Publication number: 20140240135
    Abstract: A system used to determine the near presence of a tornado and to alert those in the immediate area.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 28, 2014
    Inventor: John F. Semrau