Granted Patent
Utility
US 5,951,888 · App. 09/112,873
Plasma electrode with arc-starting grooves
Inventor:
Thomas Franklin Oakley
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Jul 9, 1998
Inventor
Thomas Franklin Oakley
Assignee (at issue)
THE ESAB GROUP 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.