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 Juho Fredrik LahtinenfiledCriticalJuho Fredrik Lahtinen
Priority to FI624/74ApriorityCriticalpatent/FI62474A7/fi
Publication of FI62474A7publicationCriticalpatent/FI62474A7/fi