Granted Patent
Utility
US 4,253,624 · App. 06/137,839
Welding wire dispenser
Inventor:
Robert Colbert
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Apr 7, 1980
Inventor
Robert Colbert
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.