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Priority claimed from GB848417929Aexternal-prioritypatent/GB8417929D0/en
Priority claimed from GB848428693Aexternal-prioritypatent/GB8428693D0/en
Application filed by John Leishman SneddonfiledCriticalJohn Leishman Sneddon
Priority claimed from EP85304858Aexternal-prioritypatent/EP0169682B1/de
Application grantedgrantedCritical
Publication of ATE64178T1publicationCriticalpatent/ATE64178T1/de