Patents by Inventor Edgar Helge Fred Radke

Edgar Helge Fred Radke 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).

  • Patch for fabric air tubes
    Patent number: 6013343
    Abstract: A patch for a ducting wall has two sealing portions, one of which may be bent to pass through a torn opening in the ducting wall. When jointed by a coupling means, the two sealing portions may pinch the ducting wall surrounding the torn opening and provide a barrier against the escape of air through the opening.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: January 11, 2000
    Inventors: Edgar Helge Fred Radke, Constantinos J. Joannou