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 Boleslaw Smialy Kopalnia WeglafiledCriticalBoleslaw Smialy Kopalnia Wegla
Priority to PL28623190ApriorityCriticalpatent/PL161912B1/en
Publication of PL286231A2publicationCriticalpatent/PL286231A2/en
Publication of PL161912B1publicationCriticalpatent/PL161912B1/en