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.)
Filing date
Publication date
Priority claimed from NO3431/70Aexternal-prioritypatent/NO131401C/no
Application filed by British Steel CorpfiledCriticalBritish Steel Corp
Priority to NO743353ApriorityCriticalpatent/NO131477C/no
Publication of NO131477BpublicationCriticalpatent/NO131477B/no
Publication of NO131477CpublicationCriticalpatent/NO131477C/no