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Inventor (Niepce) Entra (link) https://es.wikipedia.org/wiki/Historia_de_la_fotograf%C3%ADa
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Inventor ( L. Sholes)
Entra (link) https://ca.wikipedia.org/wiki/M%C3%A0quina_d%27escriure -
Inventor (A. Graham Bell)
https://ca.wikipedia.org/wiki/Tel%C3%A8fon -
Inventor (Marconi)
https://ca.wikipedia.org/wiki/R%C3%A0dio -
Inventor Edison (link) https://es.wikipedia.org/wiki/Tocadiscos
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