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Priority claimed from GB868619158Aexternal-prioritypatent/GB8619158D0/en
Priority claimed from GB878705748Aexternal-prioritypatent/GB8705748D0/en
Application filed by Turnblade LtdfiledCriticalTurnblade Ltd
Priority claimed from EP19870306913external-prioritypatent/EP0262771B1/de
Application grantedgrantedCritical
Publication of ATE62810T1publicationCriticalpatent/ATE62810T1/de