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UMA DISPOSIÇÃO DE BOBINAS AUTO-INDUCTORAS PARA CARGA DE LINHAS TELEPHONICAS

0.1 - Acervo Histórico de patentes do INPI-18939
Item
13/10/1921

Part of Acervo Histórico de patentes do INPI

UMA DISPOSIÇÃO DE BOBINAS AUTO-INDUTORAS PARA CARGA DE LINHAS TELEFÔNICAS

EUGEN SCHÜRER

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