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Priority claimed from CH225072Aexternal-prioritypatent/CH551604A/fr
Priority claimed from CH1123672Aexternal-prioritypatent/CH553952A/fr
Application filed by Stich Ernest, Dreier Saner UrsfiledCriticalStich Ernest
Publication of ATA135073ApublicationCriticalpatent/ATA135073A/de
Application grantedgrantedCritical
Publication of AT326316BpublicationCriticalpatent/AT326316B/de