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Priority claimed from DE19742433763external-prioritypatent/DE2433763C3/de
Application filed by Hadue Lehrmittel GmbhfiledCriticalHadue Lehrmittel Gmbh
Publication of ATA37676ApublicationCriticalpatent/ATA37676A/de
Application grantedgrantedCritical
Publication of AT352446BpublicationCriticalpatent/AT352446B/de