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 Ing Maska, Jaroslav PokornyfiledCriticalJan Ing Maska
Priority to CS862091ApriorityCriticalpatent/CS259729B1/en
Publication of CS209186A1publicationCriticalpatent/CS209186A1/en
Publication of CS259729B1publicationCriticalpatent/CS259729B1/en