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1 ene 1921 año - The first car-to-car radios are used

Descripción:

The Detroit Police Department began using mobile radios in their police cars. They used them to talk between cars, but it didn't work very well.

Añadido al timeline:

History of Cellphones

8 nov 2017

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539

fecha:

1 ene 1921 año

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~ 104 years ago

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