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Priority claimed from DESCH41819Uexternal-prioritypatent/DE1957240U/de
Priority claimed from DE1967SC041820external-prioritypatent/DE1957241U/de
Priority claimed from DESCH42282Uexternal-prioritypatent/DE1966614U/de
Application filedfiledCritical
Publication of NL6714941ApublicationCriticalpatent/NL6714941A/xx