Who invented the first down indicator-marker that is only visible on television?
The 1st down marker indicator was started by John Madden in the Madden football game series, long ago. He did this to tell people where they had to get to in the game, and the NFL used this idea to have what we use now.
Television was invented in the year of 1948. 2nd Answer: The above answer is quite wrong. The first TV broadcast was in 1939 in New York, and the TV was invented by an Idaho farm boy named Philo Farnsworth, who invented many other things in his lifetime. His television, the first with no mechanical parts that could actually broadcast an image was demonstrated in 1929.