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Priority claimed from GB838328990Aexternal-prioritypatent/GB8328990D0/en
Priority claimed from GB848412148Aexternal-prioritypatent/GB8412148D0/en
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Priority claimed from EP84307496Aexternal-prioritypatent/EP0147032B1/de
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Publication of ATE50164T1publicationCriticalpatent/ATE50164T1/de