Patents by Inventor Leopold Boswarth

Leopold Boswarth 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).

  • Method of manufacturing a one-sided or two-sided punching knife for non-metallic materials
    Patent number: 4938105
    Abstract: A method for fabrication of a one-sided or two-sided punching knife (1) for non-metallic materials such as leather, textiles, paper, etc. with a groove (4) lying on the inside and reinforcing plate (3) engaging into the groove. The reinforcing plate (3) is of non-metallic material and is stamped out by the knife (1) which it is intended to reinforce.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: July 3, 1990
    Assignee: Martin Miller Aktiengesellschaft
    Inventor: Leopold Boswarth