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Priority claimed from DE2537791Aexternal-prioritypatent/DE2537791C2/de
Application filed by Hilti AgfiledCriticalHilti Ag
Priority to AT194778ApriorityCriticalpatent/AT358889B/de
Publication of ATA194778ApublicationCriticalpatent/ATA194778A/de
Application grantedgrantedCritical
Publication of AT358889BpublicationCriticalpatent/AT358889B/de