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 Erkki Johannes TorppalafiledCriticalErkki Johannes Torppala
Priority to FI854439ApriorityCriticalpatent/FI854439A0/en
Publication of FI854439A0publicationCriticalpatent/FI854439A0/en