Granted Patent
Utility
US 6,604,667 · App. 10/172,818
Device for joining, by friction stir welding, at least two workpieces
Inventors:
Christoph Schilling, Jorge Santos
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: May 16, 2002
Inventors
Christoph Schilling
Jorge Santos
Assignee (at issue)
GKSS-Forschungszentrum Geesthacht GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.