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Sourcethey created a device that could transmit speech, the telephone.
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SourceAlexander expieremnts around with the telephone.
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Sourceinvented the demostraded his invention then it took off in markets.
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they proved to the public that sounds coulc be sent through a wire.
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made the first sucessfull telephone call saying "Watson, come here, I need you".
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Sourcethe invention was called the box telephone and it was callled that becuase it was shaped like a box.
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Sourceinvented the carbon-butten transmitter improving telephones.
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Sourcethey took a trip around the world and showed there invention and it became a huge sucess.