Granted Patent
Utility
US 4,883,924 · App. 07/222,054
Outlet fitting
Inventor:
Robert W. Hadfield
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Jul 20, 1988
Inventor
Robert W. Hadfield
Assignee (at issue)
BUTLER MANUFACTURING 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.