Patents by Inventor Ephrem Christen

Ephrem Christen 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).

  • Housing for welding extruder
    Patent number: D567833
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: April 29, 2008
    Assignee: LEISTER Process Technologies
    Inventors: René Stirnimann, Ephrem Christen