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APERFEIÇOAMENTO EM SYSTEMAS DE DISTRIBUIÇÃO DE CHAMADAS PARA ESTAÇÕES CENTRAES TELEPHONICAS

0.1 - Acervo Histórico de patentes do INPI-14190
Item
11/04/1917

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTO EM SISTEMAS DE DISTRIBUIÇÃO DE CHAMADAS PARA ESTAÇÕES CENTRAIS TELEFÔNICAS

WESTERN ELECTRIC COMPANY

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