Granted Patent
Utility
US 4,248,318 · App. 06/098,703
Railway car truck load indicator
Inventor:
Gerald D. O'Neil
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Nov 29, 1979
Inventor
Gerald D. O'Neil
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.