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Priority claimed from US06/501,187external-prioritypatent/US4548922A/en
Priority claimed from US06/614,115external-prioritypatent/US4746508A/en
Application filed by Martin C Carey, Alan C Moses, Jeffrey S FlierfiledCriticalMartin C Carey
Application grantedgrantedCritical
Publication of ATE84223T1publicationCriticalpatent/ATE84223T1/en