Granted Patent
Utility
US 4,577,431 · App. 06/606,110
Wear resistant gun barrel and method of forming
Inventors:
Paul A. Siemers, Robert W. Kopp, Melvin Robert Jackson, Steven R. Duke, David P. Perrin, Ying Liu
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: May 2, 1984
Inventors
Paul A. Siemers
Robert W. Kopp
Melvin Robert Jackson
Steven R. Duke
David P. Perrin
Ying Liu
Assignee (at issue)
General Electric Company
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.