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Priority claimed from CH311272Aexternal-prioritypatent/CH533833A/de
Application filed by M FroelichfiledCriticalM Froelich
Publication of DK140574BpublicationCriticalpatent/DK140574B/da
Application grantedgrantedCritical
Publication of DK140574CpublicationCriticalpatent/DK140574C/da
