Telephone

1. Telephone

The modern world is simply
impossible to imagine without the
existence of phones, we actively use
this boon, but not every one of us
knows who invented the telephone
first. We are all accustomed to is a if
for any reason remain without a
phone, you feel isolated from the
world.
Diana Grishonkova
9A

2.

In
1860 in the US, the
immigrant of Italian descent
Antonio Meucci
demonstrated a device that
could transmit sounds
through wires, and named
Telectrophon. Meucci filed a
patent for his invention in
1871.

3.

In
1861, German physicist and inventor
Johann Philipp Reis demonstrated another
device that could transmit musical tones and
human speech through wires. The device had
a microphone to the original design, power
source and speaker. The Flight was called
they designed a device Telephon.

4.

Telephone, patented in the USA in 1876 by
Alexander Graham bell, was called "speaking
Telegraph". For a long time Alexander Bell was
considered the official inventor of the telephone
and only 11 June 2002, the US Congress
resolution No. 269, recognized the right of the
invention of the telephone Antonio Meucci

5.

Thank you !