Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from US06/180,225external-prioritypatent/US4374630A/en
Application filed by Vetco Offshore Ind IncfiledCriticalVetco Offshore Ind Inc
Priority to NO812794ApriorityCriticalpatent/NO154002C/no
Publication of NO812794LpublicationCriticalpatent/NO812794L/no
Publication of NO154002BpublicationCriticalpatent/NO154002B/no
Publication of NO154002CpublicationCriticalpatent/NO154002C/no