Patents by Inventor Josef Vorwald

Josef Vorwald 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).

  • Railway road bed
    Patent number: 4500037
    Abstract: A railroad bed has an elastomeric mat which supports the ballast and on which the sleepers and rails are mounted. The mat has an upper surface formed by a metal or plastic sheet which prevents penetration of the ballast into the elastomeric body.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: February 19, 1985
    Assignee: Clouth Gummiwerke Aktiengesellschaft
    Inventors: Hans Braitsch, Hermann Ortwein, Josef Vorwald