Patents by Inventor Ludolf Bark

Ludolf Bark 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).

  • Raisable extruder head for extruders
    Patent number: 4666392
    Abstract: An extrusion die having pivotally mounted parts disposed at the die outlet and pivotal locking members for latching the pivotal parts closed.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: May 19, 1987
    Assignee: Continental Gummi-Werke Aktiengesellschaft
    Inventors: Klaus Gerloff, Hans Menell, Ludolf Bark, Friedrich Klopper, Gerhard de Vries