Bell has many other inventions (1 janv. 1881 – 31 déc. 1881)
Description:
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.Ajouté au bande de temps:
Date:
1 janv. 1881
31 déc. 1881
~ 12 months