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THE INVENTION
  OF TELEPHONE




   By: Judit Martín Cuevas and
      Zaida Merino Benítez
DEFINITION:
THE TELEPHONE HISTORY
Elisha Gray (1835-1901)




                          Alexander Graham Bell (1847-1922)
HOW TELEPHONES WORK?
THE EVOLUTION:
USEFULLNESS
     :

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The Telephone