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Priority claimed from DE2720361Aexternal-prioritypatent/DE2720361C3/de
Application filed by Feist ArtusfiledCriticalFeist Artus
Publication of ATA746377ApublicationCriticalpatent/ATA746377A/de
Application grantedgrantedCritical
Publication of AT384881BpublicationCriticalpatent/AT384881B/de