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 Kopalnia Wegla Kamiennego RozbfiledCriticalKopalnia Wegla Kamiennego Rozb
Priority to PL20952978ApriorityCriticalpatent/PL112957B2/xx
Publication of PL209529A1publicationCriticalpatent/PL209529A1/pl
Publication of PL112957B2publicationCriticalpatent/PL112957B2/xx