95zIV
Senior Member
I was actually looking for an answer in the trivia but found this and thought it would be worth posting. It's in the second paragraph where things get interesting. If this has been posted before i'm sorry but I couldn't find it on a search.
http://inventors.about.com/od/bstartinventions/a/bulldozer.htm
http://inventors.about.com/od/bstartinventions/a/bulldozer.htm