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April 1, 2024
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jan 1, 1861 - sound transmission
Description:
By 1861 Johann Philip Reis of Germany had designed several instruments for the transmission of sound.
Added to timeline:
24 Oct 2018
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231
History of Phones
Osasere Guobadia
first period
Date:
jan 1, 1861
Now
~ 163 years ago
Images: