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Priority claimed from DED39521Aexternal-prioritypatent/DE1301819B/de
Priority claimed from DED39855Aexternal-prioritypatent/DE1172684B/de
Priority claimed from GB998463Aexternal-prioritypatent/GB1083672A/en
Application filed by DegussafiledCriticalDegussa
Publication of DK111929BpublicationCriticalpatent/DK111929B/da