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Priority claimed from US06/202,977external-prioritypatent/US4507001A/en
Application filed by Xerox CorporationfiledCriticalXerox Corporation
Priority claimed from EP19810301703external-prioritypatent/EP0038691B1/en
Application grantedgrantedCritical
Publication of ATE8355T1publicationCriticalpatent/ATE8355T1/en