Granted Patent
Utility
US 6,722,288 · App. 10/136,128
Railway box car with lower center of gravity
Inventor:
Albert A. Beers
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: May 1, 2002
Inventor
Albert A. Beers
Assignee (at issue)
TRN Business Trust
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.