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Priority claimed from DEP48570Aexternal-prioritypatent/DE1084416B/en
Priority claimed from DEP55021Aexternal-prioritypatent/DE1134787B/en
Application filed by Walther & Cie AgfiledCriticalWalther & Cie Ag
Application grantedgrantedCritical
Publication of AT183153BpublicationCriticalpatent/AT183153B/en