Granted Patent
Utility
US 4,549,666 · App. 06/431,246
Railway vehicle draft sill and slackless draft assembly
Inventors:
Russell G. Altherr, Steven F. Schmitt
Patented Case
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Granted: Oct 29, 1985
Filed: Sep 30, 1982
Inventors
Russell G. Altherr
Steven F. Schmitt
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.