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 Elfving Oy AbfiledCriticalElfving Oy Ab
Priority to FI770780ApriorityCriticalpatent/FI54989C/en
Publication of FI770780ApublicationCriticalpatent/FI770780A/en
Publication of FI54989BpublicationCriticalpatent/FI54989B/en
Application grantedgrantedCritical
Publication of FI54989CpublicationCriticalpatent/FI54989C/en