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Application filed by Nl N V Philips GloeilampenfabrfiledCriticalNl N V Philips Gloeilampenfabr
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DK57838D1936-07-131937-07-10Fremgangsmaade til Farvning af et Svingningsspor, især Tonespor, samt Bærer til Anvendelse ved Fremgangsmaaden.
DK57838C
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