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 FI844858Aexternal-prioritypatent/FI74747C/en
Application filed by Puhtaco OyfiledCriticalPuhtaco Oy
Application grantedgrantedCritical
Publication of ATE47732T1publicationCriticalpatent/ATE47732T1/en