Patents by Inventor Donald Hoff

Donald Hoff 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).

  • Apparatus for applying a continuous film to a pipeline
    Patent number: 5273611
    Abstract: An apparatus for applying a continuous film to a tube. A carriage allows the apparatus to move axially along the exterior of the tube. A film holder retains and dispenses the continuous film. A mechanism is provided to change the orientation of the film after being dispensed from the film holder. Guide rollers spaced radially and axially about the tube shape the continuous film longitudinally about the circumference of the tube.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: December 28, 1993
    Assignee: SIG-A-RAP
    Inventors: Brian C. Webb, Donald Hoff, John Hoff