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Priority claimed from US06/589,699external-prioritypatent/US4601157A/en
Application filed by Crowell CorpfiledCriticalCrowell Corp
Priority claimed from EP85901730Aexternal-prioritypatent/EP0175753B1/de
Application grantedgrantedCritical
Publication of ATE45320T1publicationCriticalpatent/ATE45320T1/de