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TELEGRAPH
Was developed by Samuel Morse. -
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Multiplexing
Allowed people to send message using a single cable. -
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Antonio Meucci
Was the first person to transmit the voice across a distance using an electrical device, but finally he couldn't patent his invention. -
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Transcontinental telegraph
Pony Express was remplaced by this telegraph -
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The patent
16 years later he obtained a patent for the telephone. -
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MOBILE PHONE
It was made by Martin Cooper -
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Commercial mobile phone
The first commercial mobile phone that arrived in US and Japan, -
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Popularitzation
The popularitzation of mobile phone began in the 1990s -
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THE FIXED TELEPHONE
The US Congress recognised the true inventor was an unknow Italian immigrant called Antonio Meucci.