1 май 1874 г. - Bell invents the telephone
Описание:
He starts experimenting on the phonoautograph, a machine that helps plot sound waves. In the summer of this year he came up with the idea of a telephone. He hired an assistant named Thomas Watson.Добавлено на ленту времени:
Дата:
1 май 1874 г.
Сейчас
~ 151 г назад