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Priority claimed from DE1965E0029320external-prioritypatent/DE1501032A1/de
Application filed by Hermann Etscheid, Bertram ZimmermannfiledCriticalHermann Etscheid
Priority to DK502567ApriorityCriticalpatent/DK137146B/da
Publication of DK137146BpublicationCriticalpatent/DK137146B/da