In May, 1878, Mr. Alexander Graham Bell, will known in connection with ... between distant exploring or surveying stations, tbe photophone also promises to be serviceable. Another result of ...

As Alexander Graham Bell Day approaches ... He later invented other sound-related technologies, including the photophone and graphophone, while also working on medical innovations.

Alexander Graham Bell is most well known for inventing the telephone. He came to the U.S as a teacher of the deaf, and conceived the idea of "electronic speech" while visiting his hearing-impaired ...