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Heinrich Hertz proved you could transmit and receive electric waves wirelessly. -
Marconi sent the first wireless communication over a open sea -
In 1891 Nikola Tesla invented the Tesla Coil which was used a lot in radio. Tesla coil produces low current, high voltage, and high frequency alternating-current electricity. -
Marconi sends the first transatlantic message from Ireland to Canada. -
KDKA is created in Pittsburg which becomes the first radio station in the US. -
In 1922 WEAF aired the first on air commercial. It was 10 minutes for an apartment complex.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.