Granted Patent
Utility
US 4,552,074 · App. 06/553,824
Primary suspension for railroad car truck
Inventors:
Harry W. Mulcahy, Dimitris Garivaltis, Stanley Karbowniczek, Horst T. Kaufhold
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Nov 21, 1983
Inventors
Harry W. Mulcahy
Dimitris Garivaltis
Stanley Karbowniczek
Horst T. Kaufhold
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.