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
Priority claimed from FI880560Aexternal-prioritypatent/FI80083C/en
Application filed by Osmo AhofiledCriticalOsmo Aho
Publication of ATA902389ApublicationCriticalpatent/ATA902389A/en
Application grantedgrantedCritical
Publication of AT396128BpublicationCriticalpatent/AT396128B/en