Granted Patent
Utility
US 4,445,439 · App. 06/302,217
Railroad vehicle truck with single wheelset
Inventors:
Lynn K. Tilly, John J. Sawa
Patented Case
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Granted: May 1, 1984
Filed: Sep 14, 1981
Inventors
Lynn K. Tilly
John J. Sawa
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.