for example:
http://www.google.com/patents?vid=USPATD179400&id=F8ByAAAAEBAJ&pg=PP1&dq=lionel++locomotive
and, a Marx toy rabbit locomotive that BB might like
http://www.google.com/patents?vid=USPATD95768&id=TixrAAAAEBAJ&pg=PP1&dq=marx+locomotive
and a Marx signal system for trains
http://www.google.com/patents?vid=USPAT2064311&id=NwxNAAAAEBAJ&pg=PP1&dq=marx+locomotive
there’s even a ton of patents for grits! e.g.,
http://www.google.com/patents?vid=USPAT2230672&id=XVJQAAAAEBAJ&dq=grits&jtp=1#PPP1,M1