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APERFEIÇOAMENTOS EM MICROPHONES DIFFERENCIAES

0.1 - Acervo Histórico de patentes do INPI-15264
Item
23/09/1918

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTOS EM MICROFONES DIFERENCIAIS

PAUL JAY HACKETT

APERFEIÇOAMENTOS EM MICROPHONES

0.1 - Acervo Histórico de patentes do INPI-14901
Item
10/04/1918

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTOS EM MICROFONES

PAUL JAY HACKETT

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