Granted Patent
Utility
US 4,254,713 · App. 06/096,462
Damping railway truck friction shoe
Inventor:
Arthur H. Clafford
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Nov 21, 1979
Inventor
Arthur H. Clafford
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.