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 Jozef Ing Zajac, Ivan Ing PetrasfiledCriticalJozef Ing Zajac
Priority to CS826278ApriorityCriticalpatent/CS231523B1/en
Publication of CS627882A1publicationCriticalpatent/CS627882A1/en
Publication of CS231523B1publicationCriticalpatent/CS231523B1/en