Granted Patent
Utility
US 4,620,079 · App. 06/783,735
Stud welding device
Inventors:
Gunther Allmann, Hans Wiessler
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Oct 3, 1985
Inventors
Gunther Allmann
Hans Wiessler
Assignee (at issue)
USM Holding 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.