Patents

I was doing research.

If you go to patents.Google.com, you will find certainly the US Patent office catalog. I’ve not tried for other nations yet.

I searched on Bedroom, assigned to the Pullman Company, 1930-1940, and I came up with a ton of technical data on passenger rail cars.

I wonder what will happen when I search on locomotives?

Google patents, like google books ,is a great resource. I hope you have a lot of time!