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First 'headphone' invented by Nathaniel Baldwin
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First dynamic headphones created by Beyerdynamic.
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John Kross developed stereo headphones.
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Smaller and smaller headphones are being made.
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Lighter headphones come out as a result to the invention of the Walkman
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Earbuds are invented
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Buds fit further into the ear canal
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Celebrities, like 50 Cent, create their own headphones