Patents by Inventor Randall S. Hufnagel

Randall S. Hufnagel 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).

  • Patent number: 8328448
    Abstract: A hardware hole filling device featuring a tube having an inner cavity for holding a filling; a tip disposed on the first end of the tube; a tip nozzle removably attached to the tip of the tube; a removably screw cap for covering the tip nozzle; and a riser mechanism functioning to push the filling from the inner cavity of the tube to the tip nozzle, the riser mechanism involves a threaded riser shaft, a riser threaded on the riser shaft, and a shaft base, the riser shaft can be moved in a first direction and a second direction by twisting the shaft base causing the riser to moved upwardly and downwardly, respectively, on the riser shaft, when the riser is moved upwardly the filling in the inner cavity of the tube is pushed to the tip nozzle.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: December 11, 2012
    Inventor: Randall S. Hufnagel