Granted Patent
Utility
US 4,243,868 · App. 06/035,226
Orbital arc-welding apparatus of split construction
Inventor:
Weldon C. Graham
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: May 2, 1979
Inventor
Weldon C. Graham
Assignee (at issue)
General Atomics
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.