Granted Patent
Utility
US 4,875,417 · App. 07/087,781
End structure for railway car
Inventors:
John W. Coulborn, John A. Krug
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Aug 21, 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.