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 Ing Zavada, Horek Premysl, Zdenek Ing RemanfiledCriticalFrantisek Ing Zavada
Priority to CS8710224ApriorityCriticalpatent/CS272320B1/en
Publication of CS1022487A1publicationCriticalpatent/CS1022487A1/en
Publication of CS272320B1publicationCriticalpatent/CS272320B1/en