Granted Patent
Utility
US 4,438,855 · App. 06/341,307
Railway coupler shelf chamfer
Inventor:
Russell G. Altherr
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Jan 21, 1982
Inventor
Russell G. Altherr
Assignee (at issue)
AMSTED 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.