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Priority claimed from DE2061177Aexternal-prioritypatent/DE2061177C3/en
Application filed by Gugel Kg Dr WilhelmfiledCriticalGugel Kg Dr Wilhelm
Publication of ATA508471ApublicationCriticalpatent/ATA508471A/en
Application grantedgrantedCritical
Publication of AT328140BpublicationCriticalpatent/AT328140B/en