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 PL28439290ApriorityCriticalpatent/PL162509B1/en
Publication of PL284392A1publicationCriticalpatent/PL284392A1/en
Publication of PL162509B1publicationCriticalpatent/PL162509B1/en