Granted Patent
Utility
US 4,922,833 · App. 07/082,446
End structure for railway car
Inventors:
John W. Coulborn, John A. Krug
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Aug 6, 1987
Inventors
John W. Coulborn
John A. Krug
Assignee (at issue)
ACF Industries 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.