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APERFEIÇOAMENTOS EM SELECTORES, ESPECIALMENTE PARA PERMUTAS TELEPHONICAS AUTOMATICAS

0.1 - Acervo Histórico de patentes do INPI-11157
Stuk
19/03/1913

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTOS EM SELETORES, ESPECIALMENTE PARA PERMUTAS TELEFÔNICAS AUTOMÁTICAS

GOTTHILF ANSGARIUS BETULANDER

APERFEIÇOAMENTOS EM TRANSMISSORES DE IMPULSOS PARA SYSTEMAS TELEPHONICOS AUTOMATICOS

0.1 - Acervo Histórico de patentes do INPI-11104
Stuk
25/02/1913

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTOS EM TRANSMISSORES DE IMPULSOS PARA SISTEMAS TELEFÔNICOS AUTOMÁTICOS

GOTTHILF ANSGARIUS BETULANDER

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