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Priority claimed from DEL56873Dexternal-prioritypatent/DE404822C/de
Priority claimed from DEL57027Dexternal-prioritypatent/DE438798C/de
Priority claimed from DEL57398Dexternal-prioritypatent/DE404823C/de
Application filed by Sven Gustaf LindequistfiledCriticalSven Gustaf Lindequist
Application grantedgrantedCritical
Publication of AT103120BpublicationCriticalpatent/AT103120B/de