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Priority claimed from DE19792926276external-prioritypatent/DE2926276A1/de
Priority claimed from DE19803018407external-prioritypatent/DE3018407A1/de
Application filed by International Business Machines CorporationfiledCriticalInternational Business Machines Corporation
Priority claimed from EP80103387Aexternal-prioritypatent/EP0021335B1/de
Application grantedgrantedCritical
Publication of ATE5243T1publicationCriticalpatent/ATE5243T1/de