Granted Patent
Utility
US 4,409,002 · App. 06/373,043
Utility torch having head mixer
Inventor:
Roger D. Zwicker
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Apr 29, 1982
Inventor
Roger D. Zwicker
Assignee (at issue)
VICTOR EQUIPMENT 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.