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 NO1650/70Aexternal-prioritypatent/NO130659C/no
Application filed by Minnesota Mining & MfgfiledCriticalMinnesota Mining & Mfg
Priority to NO55973ApriorityCriticalpatent/NO133606C/no
Publication of NO133606BpublicationCriticalpatent/NO133606B/no
Publication of NO133606CpublicationCriticalpatent/NO133606C/no