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 Przed Eksploatacji Wegla PolnofiledCriticalPrzed Eksploatacji Wegla Polno
Priority to PL28177689ApriorityCriticalpatent/PL281776A1/en
Publication of PL281776A1publicationCriticalpatent/PL281776A1/en