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 Ludvik Ripper, Oldrich HorakfiledCriticalLudvik Ripper
Priority to CS696575ApriorityCriticalpatent/CS179721B1/cs
Publication of CS179721B1publicationCriticalpatent/CS179721B1/cs