Granted Patent
Utility
US 4,492,841 · App. 06/485,804
Constant potential/constant current automatic control system for air-carbon arc metal removal
Inventor:
Henry B. Delius
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Apr 18, 1983
Inventor
Henry B. Delius
Assignee (at issue)
Arcair 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.