Granted Patent
Utility
US 4,307,910 · App. 06/137,176
Railway wheels and light weight axles
Inventor:
Eschenburg Rodney
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Apr 4, 1980
Inventor
Eschenburg Rodney
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.