The world's first 625-line television standard was designed in the Soviet Union in 1944, and became a national standard in 1946. The first broadcast in 625-line standard occurred in 1948 in Moscow. The concept of 625 lines per frame was subsequently implemented in the European CCIR standard.
https://en.wikipedia.org/wiki/History_of_television
Before 1947 the number of U.S. homes with television sets could be measured in the thousands. By the late 1990s, 98 percent of U.S. homes had at least one television set, and those sets were on for an average of more than seven hours a day.
https://www.nyu.edu/classes/stephens/History%20of%20Television%20page.htm
The first regular commercial television broadcast in the US was by RCA in 1939. This was ten years after Philo Farnsworth has demonstrated fully electronic television in Ameri…ca. Regular broadcasts may have started sooner but progress was slowed by legal battles over the patents for the technology.
http://www.answers.com/Q/When_was_the_first_US_tv_broadcast
RCA began selling television sets with 5 by 12 in (12.7 by 25.4 cm) picture tubes. The company also began broadcasting regular programs, including scenes captured by a mobile unit and, on May 17, 1939, the first televised baseball gameÑbetween Princeton and Columbia universities.
https://www.nyu.edu/classes/stephens/History%20of%20Television%20page.htm
The first color television project is claimed by him, and was patented in Germany on March 31, 1908, patent № 197183, then in Britain, on April 1, 1908, patent № 7219, in France (patent № 390326) and in Russia in 1910 (patent № 17912).
https://en.wikipedia.org/wiki/History_of_television
In 1939, RCA televised the opening of the New York World's Fair, including a speech by President Franklin Delano Roosevelt, who was the first president to appear on television. Later that year RCA paid for a license to use Farnsworth's television patents.
https://www.nyu.edu/classes/stephens/History%20of%20Television%20page.htm
The Federal Communications Commission's (FCC) 1941 ruling that the National Broadcasting Company (NBC) had to sell one of its two radio networks was upheld by the Supreme Court in 1943. The second network became the new American Broadcasting Company (ABC), which would enter television early in the next decade.
https://www.nyu.edu/classes/stephens/History%20of%20Television%20page.htm
In 1927, Baird transmitted a signal over 438 miles (705 km) of telephone line between London and Glasgow. In 1928, Baird's company (Baird Television Development Company/Cinema Television) broadcast the first transatlantic television signal, between London and New York, and the first shore-to-ship transmission. In 1929, he became involved in the first experimental mechanical television service in Germany. In November of the same year, Baird and Bernard Natan of Pathé established France's first television company, Télévision-Baird-Natan. In 1931, he made the first outdoor remote broadcast, of the Epsom Derby.
https://en.wikipedia.org/wiki/History_of_television
Electronic television was first successfully demonstrated in San Francisco on Sept. 7, 1927. The system was designed by Philo Taylor Farnsworth, a 21-year-old inventor who had lived in a house without electricity until he was 14.
https://www.nyu.edu/classes/stephens/History%20of%20Television%20page.htm
It was only when those legal issues had been resolved that RCA could begin their public broadcasts in 1939. The first ever television broadcast to the public began in 1929 in London, England when the BBC started their television service.<br /><br /><br />The US were some years behind.
http://www.answers.com/Q/When_was_the_first_US_tv_broadcast
when was the first television broadcast
The first television broadcast was in 1928.