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 Pekka Henrik HyttinenfiledCriticalPekka Henrik Hyttinen
Priority to FI781536ApriorityCriticalpatent/FI61275C/en
Publication of FI781536ApublicationCriticalpatent/FI781536A/en
Publication of FI61275BpublicationCriticalpatent/FI61275B/en
Application grantedgrantedCritical
Publication of FI61275CpublicationCriticalpatent/FI61275C/en