Granted Patent
Utility
US 6,825,434 · App. 10/203,953
Method for welding a bolt onto a workpiece and a bolt-welding device
Inventors:
Jurgen Madsak, Ulrich Citrich, Steffen Hailer
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Nov 5, 2002
Inventors
Jurgen Madsak
Ulrich Citrich
Steffen Hailer
Assignee (at issue)
Nelson Bolzenschweiss—Technik GmbH & Co. KG
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.