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Priority claimed from US06/163,884external-prioritypatent/US4513107A/en
Application filed by Minnesota Mining & MfgfiledCriticalMinnesota Mining & Mfg
Priority claimed from EP19810302695external-prioritypatent/EP0043658B1/de
Application grantedgrantedCritical
Publication of ATE23375T1publicationCriticalpatent/ATE23375T1/de