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In 1895 Marconi invents the radio he may not have been the first but he was the best at PR.
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In 1906, Lee De Forest, created (or "borrowed" the idea for) the audion tube, a vacuum tube that amplified signals.
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Radio Stations became a thing in 1920 and are still around today
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In 1922 WEAF aired a 10 minutes 'commercial' or toll broadcast, for an apartment complex charging $50
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Organized licensing, assigned radios station frequencies,call letters, and power limits
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Golden era begins in the middle of the Great Depression
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.