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APERFEIÇOAMENTOS EM MEIOS PARA CONCENTRAR OU INTENSAR A LUZ DE LAMPADAS ELECTRICAS DE FILAMENTO

0.1 - Acervo Histórico de patentes do INPI-17925
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17/12/1920

Part of Acervo Histórico de patentes do INPI

APERFEIÇOAMENTOS EM MEIOS PARA CONCENTRAR OU INTENSAR A LUZ DE LÂMPADAS ELÉTRICAS DE FILAMENTO

ARTHUR GRAHAM FRANCE

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