3479315 Elisha Gray\'s telephone, 1879; (add.info.: Elisha Gray\'s telephone, as described in his patent caveat of 14th February 1876. The Speaking Telephone, New York, 1879.); Universal History Archive/UIG; out of copyright.
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TOP27536314
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達志影像
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RM
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須由TPG 完整授權
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19thcentury19centuryXIXcenturyXIXthcenturycommunicationcommunicationselectricityelectricelectriciteUSAunitedstatesu.s.aunitedstatesofamericaunitesstatesofamericaamericanNorthAmericaAmericainventorcreatorinventionpatentelectricaltelephonecompetitorelishagrayelectriccompetitorelishagraypatentinventorelectrical19thcenturyelectricityalexandergrahambellinventionamericantelephoneunitedstates1870scommunicationcompetitorelishagraypatentinventorelectrical19thcenturyelectricityalexandergrahambellinventionamericantelephoneunitedstates1870scommunication
1870s1870s1919th19th19thAmericaAmericaNorthUSAXIXXIXthalexanderalexanderamericaamericaamericanamericanamericanbellbellcenturycenturycenturycenturycenturycenturycommunicationcommunicationcommunicationcommunicationscompetitorcompetitorcompetitorcreatorelectricelectricelectricalelectricalelectricalelectriciteelectricityelectricityelectricityelishaelishaelishagrahamgrahamgraygraygrayinventioninventioninventioninventorinventorinventorofofpatentpatentpatentstatesstatesstatesstatesstatestelephonetelephonetelephoneu.s.aunitedunitedunitedunitedunites
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