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UM COMPENSADOR ELECTRICO PARA DETERMINAR A DIRECÇÃO DE FONTES DISTANTES DE ENERGIA DE RADIO, ESPECIALMENTE FONTES SONORAS

0.1 - Acervo Histórico de patentes do INPI-17058
Stuk
25/06/1920

Part of Acervo Histórico de patentes do INPI

UM COMPENSADOR ELÉTRICO PARA DETERMINAR A DIREÇÃO DE FONTES DISTANTES DE ENERGIA DE RÁDIO, ESPECIALMENTE FONTES SONORAS

STEWARD DAVIT & EQUIPMENT CORPORATION

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