Granted Patent
Utility
US 4,444,121 · App. 06/313,945
Single wheelset railway truck rigid transom connected sideframes
Inventors:
Lynn K. Tilly, James M. Kemper
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Oct 22, 1981
Inventors
Lynn K. Tilly
James M. Kemper
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.