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Priority claimed from NO833559Aexternal-prioritypatent/NO163913C/no
Publication of NO891181LpublicationCriticalpatent/NO891181L/no
Application filed by Cooper Cameron Corp, Koomey Blowout Preventers IncfiledCriticalCooper Cameron Corp
Priority to NO891181ApriorityCriticalpatent/NO179021C/no
Publication of NO891181D0publicationCriticalpatent/NO891181D0/no
Publication of NO179021BpublicationCriticalpatent/NO179021B/no
Publication of NO179021CpublicationCriticalpatent/NO179021C/no