Patents by Inventor Erhard Jaspert

Erhard Jaspert 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).

  • Controlling upsetting during welding of a split tube
    Patent number: 4287402
    Abstract: Markings are placed alongside the gap of a split tube and their distance is measured downstream from the point of welding; the measuring result is used to control upsetting pressure in the weld print.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: September 1, 1981
    Assignee: Mannesmann AG.
    Inventors: Erhard Hentzschel, Erhard Jaspert, Kurt Niederhoff