Patents by Inventor Siegfried Honisch

Siegfried Honisch 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).

  • Apparatus for forming a split tube
    Patent number: 4403491
    Abstract: A die member has a conical bore with a cylindrical extension, and a shallow groove in the conical bore; a conical mandrel with a cylindrical extension fills the conical bore, except for the groove which merges into an annular space between the cylindrical bore and the extension. A metal strip is pulled through the groove and the space is to be folded into a split tube.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: September 13, 1983
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Johannes Wassen, Siegfried Honisch