Bell and his assistant Charles Sumner Tainter jointly invented a wireless telephone, named a photophone, which allowed for the transmission of both sounds and normal human conversations on a beam of light. Both men later became full associates in the Volta Laboratory Association.
Bell and his assistant Charles Sumner Tainter jointly invented a wireless telephone , named a photophone , which allowed for the transmission of both sounds and normal human conversations on a beam of light . Both men later became full associates in the Volta Laboratory Association .
What did Bell call his cord-free phone?
What did Bell call his cord - free phone ?
photophone
photophone