Granted Patent
Utility
US 5,149,933 · App. 07/811,201
Welding control
Inventor:
Joseph E. Donner
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Dec 20, 1991
Inventor
Joseph E. Donner
Assignee (at issue)
Hughes Aircraft Company
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.