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 NO2286/73Aexternal-prioritypatent/NO137852C/no
Publication of NO760693LpublicationCriticalpatent/NO760693L/no
Application filed by Grace W R & CofiledCriticalGrace W R & Co
Priority to NO760693ApriorityCriticalpatent/NO139886C/no
Publication of NO139886BpublicationCriticalpatent/NO139886B/no
Publication of NO139886CpublicationCriticalpatent/NO139886C/no