Radio By Muchieman 1900 Roberto Landell De Moura transmitted the human voice wirelessly source: https://en.wikipedia.org/wiki/History_of_radio 1912 First Radio Factory https://en.wikipedia.org/wiki/History_of_radio 1920 Broadcasting Started 1921 West Virginia vs. Pitssburgh football game broadcasted https://en.wikipedia.org/wiki/History_of_radio 1926 Four Million Radios were in Homes 1928 National Networks National networks were established to sell advertising. 1947 AT&T Mobile Telephone Service 1947 Regency company introduced a pocket transistor radio 1955 Sony Pocket Radio 1963 Television through Radio Commercialized 1987 U.S. Navy launches GPS