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
Application filed by Bengt Nyman, Bo NymanfiledCriticalBengt Nyman
Priority to FI750892ApriorityCriticalpatent/FI50683C/fi
Application grantedgrantedCritical
Publication of FI50683BpublicationCriticalpatent/FI50683B/fi
Priority to SE7603635Aprioritypatent/SE404655B/xx
Publication of FI50683CpublicationCriticalpatent/FI50683C/fi