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Priority claimed from DEB43428Aexternal-prioritypatent/DE1052784B/en
Priority claimed from DEB48848Aexternal-prioritypatent/DE1059274B/en
Application filed by Albrecht BeckerfiledCriticalAlbrecht Becker
Application grantedgrantedCritical
Publication of BE594408QpublicationCriticalpatent/BE594408Q/en