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1 jan 1889 ano - Self-winding telephone exchange
Descrição:
Strowger invented the self-winding telephone exchange in 1889. It consisted in calls without an operator.
Adicionado na linha do tempo:
Telephony
By
mgonzalez
9 dez 2017
0
0
258
Data:
1 jan 1889 ano
Agora
~ 135 years ago
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