Granted Patent
Utility
US 4,188,525 · App. 05/857,359
Welding torch oscillation apparatus
Inventors:
George J. Merrick, George E. Cook, Donald D. Modglin
Patented Case
View Patent ↗
Granted: Feb 12, 1980
Filed: Dec 5, 1977
Inventors
George J. Merrick
George E. Cook
Donald D. Modglin
Assignee (at issue)
Merrick Welding 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.