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 Oiva Kullervo TarkkonenfiledCriticalOiva Kullervo Tarkkonen
Priority to FI885250ApriorityCriticalpatent/FI885250A/en
Publication of FI885250A0publicationCriticalpatent/FI885250A0/en
Publication of FI885250ApublicationCriticalpatent/FI885250A/en