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 Frantisek Krejci, Zdenek Pospisil, Jaroslav TlaskalfiledCriticalFrantisek Krejci
Priority to CS644776ApriorityCriticalpatent/CS187746B1/cs
Publication of CS187746B1publicationCriticalpatent/CS187746B1/cs