Granted Patent
Utility
US 4,347,427 · App. 06/161,233
Submerged arc welding gun
Inventors:
Dennis R. Gentilo, Donald A. Smith, David L. Pifer
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Jun 19, 1980
Inventors
Dennis R. Gentilo
Donald A. Smith
David L. Pifer
Assignee (at issue)
Elliott Turbomachinery Co., 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.