Patents by Inventor Rudolf Martinek

Rudolf Martinek 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).

  • Double shaft forced-feed mixer for continuous and discontinuous manner of operation
    Patent number: 4775239
    Abstract: A double-shaft forced-feed mixer, for example for building material mixtures, is proposed which is assembled according to the principle of movement of the batch-type mixer and is usable both for continuous and discontinuous operation.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: October 4, 1988
    Assignee: BHS-Bayerische Berg-, Hutten- und Salzwerke AG
    Inventors: Rudolf Martinek, Johannes Oertel