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Publication of DE205455CpublicationCriticalpatent/DE205455C/de
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Priority to AT40782DpriorityCriticalpatent/AT40782B/de
Auf verschiedene Schleifringdurchmesser einstellbarer Doppelbuerstenhalter fuer elektrische Maschinen mit zwei von einem gemeinsamen Herzstueck getragenen Buerstenkaesten