Granted Patent
Utility
US 5,039,835 · App. 07/558,809
Electric stud-welding device
Inventor:
Bernd Schwiete
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Jul 27, 1990
Inventor
Bernd Schwiete
Assignee (at issue)
TRW 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.