4 апр 1774 г. - Electrostatic Telegraph
Описание:
Georges Louis Lesage patents the electric telegraph. Electric Telegraph uses electric signals to send communication via radio or line. The telegraph had a separate wire for each of the 26 letters of the alphabet and its range was only between two rooms of his home.Добавлено на ленту времени:
Дата:
4 апр 1774 г.
Сейчас
~ 250 г назад
