When did tv come out in the U.S?

When did tv come out in the U.S?
Philo Farnsworth demonstrated his first electro-mechanical television in 1927 two years after John Logie Baird demonstrated his electro-mechanical system in England. This was an experimental system but in 1929, Farnsworth demonstrated the very first fully electronic television, with no moving parts. It was this system that was the basis for the first commercial television service to start in 1939. As a commercial product, US television therefore began in 1939.