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 FI854751Aexternal-prioritypatent/FI73591C/fi
Application filed by John Pertti Koivukangas, Seppo Vaeinaemoe NoponenfiledCriticalJohn Pertti Koivukangas
Application grantedgrantedCritical
Publication of ATE103157T1publicationCriticalpatent/ATE103157T1/de