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 Jan Piotrowski, Wladyslaw WisniewskifiledCriticalJan Piotrowski
Priority to PL29335392ApriorityCriticalpatent/PL167403B1/en
Publication of PL293353A1publicationCriticalpatent/PL293353A1/en
Publication of PL167403B1publicationCriticalpatent/PL167403B1/en