Patents by Inventor Josef Classen

Josef Classen 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).

  • Drilling apparatus
    Patent number: 3961673
    Abstract: A drill string is mounted on a mast which is angularly adjustable relative to a frame. A support is connected to the frame so as to be angularly adjustable and has an open aperture for the drill string. The support is to be mounted on and secured upon a stationary member, such as a pipe, disposed at the operating location of the drilling apparatus.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: June 8, 1976
    Assignee: Maschinen- und Bohrgerate-Fabrik Alfred Wirth & Co., K.G.
    Inventors: Jakob Wolters, Josef Classen