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Priority claimed from DE19833307997external-prioritypatent/DE3307997A1/de
Priority claimed from DE19833340422external-prioritypatent/DE3340422A1/de
Application filed by Viessmann HansfiledCriticalViessmann Hans
Priority claimed from EP84102324Aexternal-prioritypatent/EP0121749B1/de
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Publication of ATE25763T1publicationCriticalpatent/ATE25763T1/de