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Application filed by Veb Elektro-Apparate-Werke J. W. StalinfiledCriticalVeb Elektro-Apparate-Werke J. W. Stalin
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Publication of AT224188BpublicationCriticalpatent/AT224188B/de
Schaltungsanordnung zur Bestimmung des Vorzeichens der Phasenverschiebung zwischen zwei elektrischen Wechselgroessen, vorzugsweise zur Energierichtungsbestimmung in Netzschutzeinrichtungen