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Application filed by Allg Gluehlampenfabriks AktienfiledCriticalAllg Gluehlampenfabriks Aktien
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DK68741A1940-04-061941-04-05Fremgangsmaade til Fremstilling af skrueviklede Volframglødelegemer samt elektrisk Glødelampe med et saadant Glødelegeme.
DK66717C
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