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Priority claimed from CH4471/87Aexternal-prioritypatent/CH673177A5/fr
Priority claimed from FR8716696Aexternal-prioritypatent/FR2623946A1/fr
Application filed by Lasag AgfiledCriticalLasag Ag
Priority claimed from EP19880118295external-prioritypatent/EP0316664B1/de
Application grantedgrantedCritical
Publication of ATE74693T1publicationCriticalpatent/ATE74693T1/de