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David E. Hughes noticed that sparks could be heard in a telephone receiver when experimenting with his carbon microphone
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Heinrich Rudolf Hertz was able to prove transmitted airborne electromagnetic waves in an experiment proving Maxwell's theory of electromagnetism
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Nikola Tesla began developing his own system based on Hertz and Maxwell's ideas mainly as a means of wireless lighting and power distribution
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Italian inventor Guglielmo Marconi built the first complete commercially successful wireless telegraphy system
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Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for the first time over a 5 mile distance
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The Ausdison Tube is an electromagnetic amplifying vacuum created by Lee De Forest who is ab American inventor.
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Reginald Fessenden used a synchronous rotary-spark transmitter for the first radio program broadcast
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Sports broadcasting began,the first ever college football on radio broadcast of a 1921 West Virginia vs. Pittsburgh football game
