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Priority claimed from US06/209,222external-prioritypatent/US4620480A/en
Application filed by Publishers Equip CorpfiledCriticalPublishers Equip Corp
Priority claimed from EP81900619Aexternal-prioritypatent/EP0046787B1/de
Application grantedgrantedCritical
Publication of ATE13644T1publicationCriticalpatent/ATE13644T1/de