Granted Patent
Utility
US 4,246,849 · App. 06/092,164
Partitioned railway hopper car
Inventor:
Harold E. Gramse
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Nov 7, 1979
Inventor
Harold E. Gramse
Assignee (at issue)
The Pullman Company LLC
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.