Granted Patent
Utility
US 4,779,798 · App. 07/046,958
Gunning apparatus
Inventors:
Romeo Natolino, Paul T. Fennema
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: May 7, 1987
Inventors
Romeo Natolino
Paul T. Fennema
Assignee (at issue)
National Refractories & Minerals Corporation
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.