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 Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL28645390ApriorityCriticalpatent/PL162792B1/en
Publication of PL286453A1publicationCriticalpatent/PL286453A1/en
Publication of PL162792B1publicationCriticalpatent/PL162792B1/en