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UM NOVO APPARELHO DESTINADO AO RECEPTOR TELEPHONICO PARA TORNAR A VOZ MAIS CLARA DESTRUINDO TODOS OS RUIDOS EXTERIORES DENOMINADO PROTECTOR TELEPHONICO

0.1 - Acervo Histórico de patentes do INPI-14363
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23/07/1917

Part of Acervo Histórico de patentes do INPI

UM NOVO APARELHO DESTINADO AO RECEPTOR TELEFÔNICO PARA TORNAR A VOZ MAIS CLARA DESTRUINDO TODOS OS RUÍDOS EXTERIORES DENOMINADO PROTETOR TELEFÔNICO

LUIS PADALINO

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