Alexander Graham Bell was an eminent Scottish-born scientist, inventor,
engineer and innovator who is credited with inventing the first practical
telephone. His research on hearing and speech led him to experiment
with hearing devices. Bell considered his most famous invention to be
an intrusion on his real work as a scientist and refused to have a telephone
in his study. Many other inventions marked Bell's later life, including
groundbreaking work in optical telecommunications, hydrofoils and
aeronautics.
The radio transmitter and 'aerial' radio antenna were innovations of
Guglielmo Marconi.
