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Priority claimed from GB838321027Aexternal-prioritypatent/GB8321027D0/en
Application filed by Marshall Cavendish ServicesfiledCriticalMarshall Cavendish Services
Priority claimed from EP84304786Aexternal-prioritypatent/EP0135996B1/en
Application grantedgrantedCritical
Publication of ATE34544T1publicationCriticalpatent/ATE34544T1/en