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Priority claimed from AT707272Aexternal-prioritypatent/AT333669B/de
Priority claimed from AT89473Aexternal-prioritypatent/AT343040B/de
Priority claimed from AT498773Aexternal-prioritypatent/AT348409B/de
Application filedfiledCritical
Publication of HU169595BpublicationCriticalpatent/HU169595B/hu