Granted Patent
Utility
US 4,697,791 · App. 06/815,433
Exothermic cutting electrode
Inventors:
Harold R. Henderson, David John Mosinski
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Dec 31, 1985
Inventors
Harold R. Henderson
David John Mosinski
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.