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Priority claimed from US06/509,849external-prioritypatent/US4560574A/en
Priority claimed from US06/509,845external-prioritypatent/US4556577A/en
Priority claimed from US06/509,847external-prioritypatent/US4556578A/en
Application filed by Mallinckrodt IncfiledCriticalMallinckrodt Inc
Priority claimed from EP84304485Aexternal-prioritypatent/EP0130822B1/en
Application grantedgrantedCritical
Publication of ATE29951T1publicationCriticalpatent/ATE29951T1/en