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Priority claimed from DE2834592Aexternal-prioritypatent/DE2834592C2/de
Priority claimed from DE19792912348external-prioritypatent/DE2912348C2/de
Application filed by Esselte Pendaflex CorporationfiledCriticalEsselte Pendaflex Corporation
Priority claimed from EP79102571Aexternal-prioritypatent/EP0008027B1/de
Application grantedgrantedCritical
Publication of ATE1921T1publicationCriticalpatent/ATE1921T1/de