Granted Patent
Utility
US 5,603,448 · App. 08/362,935
Process and apparatus for cylindrical joint friction welding
Inventors:
Otto Woerner, Rudolf Reinhardt, Heinz Schultz
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Dec 23, 1994
Inventors
Otto Woerner
Rudolf Reinhardt
Heinz Schultz
Assignee (at issue)
MERCEDES-BENZ GROUP AG
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.