Radio

Marconi

Apr 4, 1895

*He got credit for sending the first radio signal

First wireless signal

Apr 4, 1899

*Marconi flashed the first wireless signal across the English Channel

Radio communications

Apr 7, 1901

Marconi conducted the first successful transatlantic experimental radio communications.

Award

Apr 7, 1904

The U.S. Patent Office awarded Marconi a patent for the invention of radio.

Audion Tube

Apr 9, 1906

Lee De Forest "borrowed" the idea for the audion tube from Reginald Fessenden which is a vacuum tube that amplified signals.

Commercial service

Apr 7, 1907

Marconi established the first commercial transatlantic radio communications service, between Ireland and Newfoundland.

Noble Prize

Apr 7, 1909

Marconi and Karl Ferdinand Braun were awarded the Nobel Prize in Physics for "contributions to the development of wireless telegraphy".

Radio Industry

Apr 9, 1920

The first radio station named "8XK" was opened by Frank Conrad.