What and when was the first offset-sides construction coal car? I've
the VGN 50000 120-ton gon blt June 1917 by Pressed Stl Car Co and VGN
G4 Class blt in Nov 1920. Earlier N&W 90-ton gons were flush-sides
cars. C&O 100000-10999 91-ton gons were not blt until Feb 1922
(Pressed Stl and Standard Stl car co's).
Did the Pressed Steel Car Company have a patent on this design?
Enterprise has a patent that is similar but for a hopper car
construction in awarded in 1925.