Granted Patent
Utility
US 4,744,308 · App. 07/018,207
Combined center plate/center filler for railway freight cars
Inventors:
Jack R. Long, Stephen W. Becker
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Feb 24, 1987
Inventors
Jack R. Long
Stephen W. Becker
Assignee (at issue)
National Casting Incorporated
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.