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Priority claimed from US06/288,457external-prioritypatent/US4378238A/en
Priority claimed from US06/288,456external-prioritypatent/US4411683A/en
Application filed by Scott & Sons Co O MfiledCriticalScott & Sons Co O M
Priority claimed from EP19820106450external-prioritypatent/EP0071128B2/en
Application grantedgrantedCritical
Publication of ATE49587T1publicationCriticalpatent/ATE49587T1/en