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Priority claimed from US06/023,412external-prioritypatent/US4221587A/en
Application filed by Allied CorpfiledCriticalAllied Corp
Priority claimed from EP80100774Aexternal-prioritypatent/EP0017723B1/de
Application grantedgrantedCritical
Publication of ATE17329T1publicationCriticalpatent/ATE17329T1/de