Patent us7735426 Diagram of covered hopper car by the gouvernement du canada Dizzy's wanderings & wonderings: wondering about a r.r. icon.
Drawings from the society’s archives and publications – the santa fe 3d train car Hopper train
Patents hopperPatents hopper car claims covered drawing Grain and drain trainHopper car diagram.
Hopper car covered pullman dizzy wonderings wanderingsPatent us5259322 .
Dizzy's Wanderings & Wonderings: Wondering About a R.R. Icon.
Patent US7735426 - Hopper cars with one or more discharge control
3d train car
Patent US5259322 - Five unit articulated covered hopper car - Google
Drawings from the Society’s archives and publications – The Santa Fe
Diagram of covered hopper car by the Gouvernement du Canada