Period

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Giovanni Caselli
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Giovanni Caselli

The Baudot telegraph, 1888
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The Baudot telegraph, 1888

The Wheatstone telegraph, 1888
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The Wheatstone telegraph, 1888

Sir Charles Wheatstone.
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Sir Charles Wheatstone.

Thomas Crampton.
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Thomas Crampton.

Thomas Alva Edison.
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Thomas Alva Edison.

Andre-Marie Ampere
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Andre-Marie Ampere

Samuel Morse
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Samuel Morse

Thomas Edison with his Gramophone
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Thomas Edison with his Gramophone

Wireless Telegraph and Telephone Station
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Wireless Telegraph and Telephone Station