Bell has many other inventions (1 янв 1881 г. – 31 дек 1881 г.)
Описание:
Bell invents the phonograph, the metal detector, a metal jacket that helped people breathe, and an audiometer that helped detect hearing problems among 18 patents given in his name. He received many honors and many awards are still given today in his name.Добавлено на ленту времени:
Дата:
1 янв 1881 г.
31 дек 1881 г.
~ 12 months