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1 Jan 1919 - Nathaniel Baldwin created headphones in his kitchen. He started making more by hand and selling them to the US Navy.
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1 Jan 1937 - In Germany, a company called Beyerdynamic started making the first dynamic headphones and named them DT-48.
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1 Jan 1958 - John C. Koss made the first stereo headphones.
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1 Jan 1966 - Koss started to make headphones with pictures with the Beatles on them which were wildly popular.
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1 Jan 2001 - Sony came out with the Walkman, sort of a huge ipod, and with it came much smaller and lighter weight headphones.
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1 Jan 2008 -With the release of the iPod, ear phones became popular and throughout the 2000's ear buds become more popular.
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1 Jan 2008 - In 2008 celebrity's endorsed headphones started to become more and more popular with endorsements by Lady Gaga, Justin Beiber, and Diddy