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Priority claimed from US06/383,929external-prioritypatent/US4488717A/en
Priority claimed from US06/383,927external-prioritypatent/US4488716A/en
Application filed by Crosfield Data Systems IncfiledCriticalCrosfield Data Systems Inc
Priority claimed from EP19830303138external-prioritypatent/EP0095937B1/de
Application grantedgrantedCritical
Publication of ATE53154T1publicationCriticalpatent/ATE53154T1/de