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1st ELECTRONIC hearing aid invented by Mille Reese Hutchinson
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1st commercially manufactured
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Vacuum tubes produced turning speech into electric signals
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Transistors replaced vacuum tubes making them smaller and less bulky
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Microprocessor intro into the digital age of technology
A list shows items. A timeline shows sequence.
Use Timetoast to make dates, milestones, and turning points easier to understand in a clear visual format. Timetoast is a timeline maker for work, school, research, and stories.