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Priority claimed from GB898920110Aexternal-prioritypatent/GB8920110D0/en
Priority claimed from GB898927072Aexternal-prioritypatent/GB8927072D0/en
Application filed by Quest IntfiledCriticalQuest Int
Priority claimed from EP90202242Aexternal-prioritypatent/EP0417825B1/en
Application grantedgrantedCritical
Publication of ATE96415T1publicationCriticalpatent/ATE96415T1/en