Granted Patent
Utility
US 6,334,397 · App. 08/766,902
Side sheets for a hopper and bulk container car
Inventor:
G. Gerald Valgora
Patented Case
View Patent ↗
Granted: Jan 1, 2002
Filed: Dec 13, 1996
Inventor
G. Gerald Valgora
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.