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Priority claimed from DEK47437Aexternal-prioritypatent/DE1201533B/de
Priority claimed from DEK49207Aexternal-prioritypatent/DE1220583B/de
Application filed by Kuper Heinrich FafiledCriticalKuper Heinrich Fa
Application grantedgrantedCritical
Publication of AT249985BpublicationCriticalpatent/AT249985B/de