Granted Patent
Utility
US 4,466,356 · App. 06/227,122
Full diameter head shield construction for railway tank car
Inventors:
Robert C. Messersmith, Richard B. Polley
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Jan 22, 1981
Inventors
Robert C. Messersmith
Richard B. Polley
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.