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Priority claimed from CH453489Aexternal-prioritypatent/CH675274A5/en
Application filed by Tratan AgfiledCriticalTratan Ag
Priority claimed from EP19900810836external-prioritypatent/EP0434603B1/en
Application grantedgrantedCritical
Publication of ATE89634T1publicationCriticalpatent/ATE89634T1/en