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Priority claimed from CA202,477Aexternal-prioritypatent/CA1000330A/en
Application filed by Northern Electric CofiledCriticalNorthern Electric Co
Publication of IT7524361A1publicationCriticalpatent/IT7524361A1/it
Application grantedgrantedCritical
Publication of IT1038924BpublicationCriticalpatent/IT1038924B/it