Granted Patent
Utility
US 4,994,640 · App. 07/502,638
Welding electrode
Inventor:
Samuel D. Kiser
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Apr 2, 1990
Inventor
Samuel D. Kiser
Assignee (at issue)
INCO Alloys 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.