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Priority claimed from US07/357,563external-prioritypatent/US4927831A/en
Priority claimed from GB898919736Aexternal-prioritypatent/GB8919736D0/en
Application filed by American Home ProdfiledCriticalAmerican Home Prod
Priority claimed from EP89310762Aexternal-prioritypatent/EP0365324B1/en
Application grantedgrantedCritical
Publication of ATE105291T1publicationCriticalpatent/ATE105291T1/en