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Priority claimed from DE19868617096external-prioritypatent/DE8617096U1/de
Priority claimed from DE19868617095external-prioritypatent/DE8617095U1/de
Application filed by Viessmann Werke KgfiledCriticalViessmann Werke Kg
Priority claimed from EP87107239Aexternal-prioritypatent/EP0252255B1/de
Application grantedgrantedCritical
Publication of ATE79203T1publicationCriticalpatent/ATE79203T1/de