Patents by Inventor Josef Landtwing

Josef Landtwing 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).

  • Process and apparatus for producing welded stamped parts
    Patent number: 5053601
    Abstract: A process for producing at least two joined-together stamped parts stamps the two stamped parts in stamping operation of a stamping tool in a stamping press that retains the two stamped parts and welds the two stamped parts together at least at one location in the course of the stamping operation with the beam of a laser.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: October 1, 1991
    Assignee: Bruderer AG
    Inventors: Josef Landtwing, Waldemar Hellwig