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Priority claimed from US06/202,578external-prioritypatent/US4354958A/en
Application filed by Eltech Systems CorpfiledCriticalEltech Systems Corp
Priority claimed from EP81305089Aexternal-prioritypatent/EP0051435B1/de
Application grantedgrantedCritical
Publication of ATE24935T1publicationCriticalpatent/ATE24935T1/de