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 Bohuslav Ing StrejcfiledCriticalBohuslav Ing Strejc
Priority to CS848070ApriorityCriticalpatent/CS252674B1/en
Publication of CS807084A1publicationCriticalpatent/CS807084A1/en
Publication of CS252674B1publicationCriticalpatent/CS252674B1/en