Radio Industry

Speech first transmitted across the continent.

Apr 4, 1915

Signal was transmitted from NYC to San Francisco and across the Atlantic Ocean to the Eiffel Tower in Paris.

KDKA Licensed Officially.

Oct 1, 1920

Westinghouse in Pittsburgh, Pennsylvania became the first US commercial broadcasting station to be licensed.

Joseph Franklin Rutherford transmitted his first radio Bible sermon.

Feb 28, 1922

High seas public radiotelephone service was inaugurated

Apr 9, 1929

FM radio was patented;

Apr 7, 1933

Edwin H. Armstrong invented this which reduces static an interference from electrical equipment.

The first telephone call was made around the world.

Apr 9, 1935

This call was made by using a combination of wire and radio circuits.

The FM radio broadcast was introduced in Germany.

Apr 7, 1945

Over 450 new stations came on the air.

Apr 9, 1952

Regency introduced a pocket transistor radio

Apr 9, 1954

The TR-1 was powered by a "standard 22.5V battery."

About 3,000 radio systems were operating

Apr 9, 1959

Sony introduces the transistor radio.

Apr 4, 1960

Marcaoni sends the first radio signal in Italy.

Mar 10, 1985

Many people believe he wasn't the first ,but he was first because of his good PR.

Digital Audio Radio Service (DARS) was established by the FCC

Apr 9, 1992

XM Radio successfully launched its two broadcast satellites

Apr 9, 2004