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23 апр 1894 г. - Spark transmitter invented

Описание:

Guglielmo Marconi invented the spark transmitter and obtained the first patent for a radio device (Omaha World Herald, 1897; Buckland & Dye, 1991).

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History of Distance Learning

ByAndrew Harned

27 окт 2018

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Дата:

23 апр 1894 г.

Сейчас

~ 131 г назад

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