Patents by Inventor Hans Pistner

Hans Pistner 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).

  • Bone screw
    Patent number: 5169400
    Abstract: In order to reduce the risk that a bone screw, in particular one made of resorbing plastic material, with an externally threaded shaft will be destroyed by high screw-in torques, it is proposed that an insertion channel open at the top, arranged concentrically with the shaft and extending along most of the length of the shaft be located in the shaft for an insertion tool and have a cross-section which is non-circular and corresponds to the cross-section of the screwing-in tool.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: December 8, 1992
    Assignee: Aesculap AG
    Inventors: Joachim Muhling, Theodor Lutze, Hans Pistner, Achim Hurst