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 Główny Instytut GórnictwafiledCriticalGłówny Instytut Górnictwa
Priority to PL129190UpriorityCriticalpatent/PL72249Y1/pl
Publication of PL129190U1publicationCriticalpatent/PL129190U1/pl
Publication of PL72249Y1publicationCriticalpatent/PL72249Y1/pl