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Priority claimed from US06/838,510external-prioritypatent/US4670462A/en
Priority claimed from US07/002,825external-prioritypatent/US4775690A/en
Application filed by American Home ProdfiledCriticalAmerican Home Prod
Priority claimed from EP87301721Aexternal-prioritypatent/EP0238226B1/en
Application grantedgrantedCritical
Publication of ATE58901T1publicationCriticalpatent/ATE58901T1/en