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Priority claimed from US06/338,542external-prioritypatent/US4431805A/en
Priority claimed from US06/413,501external-prioritypatent/US4526964A/en
Application filed by Southern Res InstfiledCriticalSouthern Res Inst
Priority claimed from EP19820108833external-prioritypatent/EP0075880B1/de
Application grantedgrantedCritical
Publication of ATE28458T1publicationCriticalpatent/ATE28458T1/de