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Antonio Meucci constructed the first telephone like devices.
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Johann Phillipp Reis constructed the prototype 'Make and break' telephones called Reis' phones.
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Alexander Graham Bell was awarded the first to invent the telephone.
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Elisha Gray designed a telephone using a water microphone in Highland Park, Illinois.
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Tivadar Pusk'as invented the telephone switchboard exchange.
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Thomas Edison invented the carbon microphone which produced a strong telephone signal