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Priority claimed from GB858512454Aexternal-prioritypatent/GB8512454D0/en
Priority claimed from GB868600838Aexternal-prioritypatent/GB8600838D0/en
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Priority claimed from EP86303559Aexternal-prioritypatent/EP0202833B1/de
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Publication of ATE60368T1publicationCriticalpatent/ATE60368T1/de