Patents by Inventor Leonhard W. Hamacher

Leonhard W. Hamacher 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).

  • Steel wire cord
    Patent number: 4176513
    Abstract: A steel wire cord which comprises an assembly of strands each of which comprises a plurality of filaments of steel, said filaments having been drawn to give a reduction in their cross-sectional area of less than 96%, the strand helix angle being not less than 40.degree. and the filament helix angle being not less than 20.degree..
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: December 4, 1979
    Assignee: Dunlop Limited
    Inventors: Maurice A. Young, Leonhard W. Hamacher