Granted Patent
Utility
US 4,791,271 · App. 07/034,652
Capstan drive assembly for filler wire in electric arc welding
Inventor:
Floyd M. Thompson
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Apr 6, 1987
Inventor
Floyd M. Thompson
Assignee (at issue)
CRC-EVANS PIPELINE INTERNATIONAL, INC.
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.