Patents by Inventor John S. Hoffmann

John S. Hoffmann 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).

  • Auger tube repair tool
    Patent number: 6094963
    Abstract: The present invention is a simple way to repair tubes, especially metal tubes such as are used in agricultural implements including combines. The present invention comprises plates and a means of bringing said plates together, compressing the tube between the plates until a deformation is sufficiently removed so bearings mounted on the auger tube can be properly oriented for support of fingers contained within the auger tube.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: August 1, 2000
    Inventor: John S. Hoffmann