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Priority claimed from GB838301733Aexternal-prioritypatent/GB8301733D0/en
Priority claimed from US06/526,494external-prioritypatent/US4567008A/en
Application filed by Hyman Int LtdfiledCriticalHyman Int Ltd
Priority claimed from EP84300270Aexternal-prioritypatent/EP0114741B1/en
Application grantedgrantedCritical
Publication of ATE33584T1publicationCriticalpatent/ATE33584T1/en