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Priority claimed from GB858511223Aexternal-prioritypatent/GB8511223D0/en
Priority claimed from GB858511225Aexternal-prioritypatent/GB8511225D0/en
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Priority claimed from EP19860303337external-prioritypatent/EP0203736B1/de
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Publication of ATE48136T1publicationCriticalpatent/ATE48136T1/de