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Priority claimed from GB838333846Aexternal-prioritypatent/GB8333846D0/en
Priority claimed from GB848420460Aexternal-prioritypatent/GB8420460D0/en
Application filed by Gkn Technology LtdfiledCriticalGkn Technology Ltd
Priority claimed from PCT/GB1984/000430external-prioritypatent/WO1985002891A1/en
Application grantedgrantedCritical
Publication of ATE41208T1publicationCriticalpatent/ATE41208T1/en