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Priority to DE19742417747priorityCriticalpatent/DE2417747C2/de
Priority claimed from DE19742417747external-prioritypatent/DE2417747C2/de
Priority to GB1069475Aprioritypatent/GB1447348A/en
Publication of DE2417747A1publicationCriticalpatent/DE2417747A1/de
Publication of DE2417747B1publicationCriticalpatent/DE2417747B1/de
Application grantedgrantedCritical
Publication of DE2417747C2publicationCriticalpatent/DE2417747C2/de