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Pichon Freres S A
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Pichon Freres S A
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Publication of DE1758604UpublicationCriticalpatent/DE1758604U/de
Fremgangsmåde til fremstilling af katodestrålerør med en elektronopfangende skærm, der er anbragt på et gennemsigtigt støtteorgan, og en gennemhullet maskeelektrode, der er anbragt mellem skærmen og rørets elektronkanon.