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Priority claimed from US00239538Aexternal-prioritypatent/US3843422A/en
Application filed by Allegheny Ludlum Ind IncfiledCriticalAllegheny Ludlum Ind Inc
Publication of NO135995BpublicationCriticalpatent/NO135995B/no
Publication of NO135995CpublicationCriticalpatent/NO135995C/no