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 SE1315568Aexternal-prioritypatent/SE321072C/sv
Application filed by Sandco LtdfiledCriticalSandco Ltd
Publication of FI773892A7publicationCriticalpatent/FI773892A7/fi