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Priority claimed from CH405689Aexternal-prioritypatent/CH680661A5/en
Application filed by Werner FennerfiledCriticalWerner Fenner
Priority claimed from EP19900810202external-prioritypatent/EP0388363B1/en
Application grantedgrantedCritical
Publication of ATE90037T1publicationCriticalpatent/ATE90037T1/en