Next you'll be telling us the yanks invented the train too!
It's funny, the things you learn from people on the Internet. Years ago, some New Zealand dude was flaming about how NZ invented flight and splitting atoms. Every country has its misinformed patriots (kooks), that's for sure.
I don't think the US invented the train, no, but the US did invent television. The dude (an American) was even on "What's My Line?" (the USA version :-P) way back in the 50's. Apparently he came up with the idea while hoeing rows on his farm.