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Philips Intellectual Property and Standards GmbH
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Philips Patentverwaltung GmbH
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Publication of DE730838CpublicationCriticalpatent/DE730838C/de
Entladungsroehre mit mindestens folgenden Elektroden: einer Kathode, einem Steuergitter, einer Anode und einem Schirmgitter zwischen Anode und Steuergitter, zwischen deren Schirmgitter und Anode sich eine Bremsraumladung ausbilden soll