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Priority claimed from US06/468,221external-prioritypatent/US4490527A/en
Priority claimed from GB838311653Aexternal-prioritypatent/GB8311653D0/en
Application filed by American Home ProdfiledCriticalAmerican Home Prod
Priority claimed from EP84301026Aexternal-prioritypatent/EP0120585B1/de
Application grantedgrantedCritical
Publication of ATE31417T1publicationCriticalpatent/ATE31417T1/de