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 Rudolf Ing DatkofiledCriticalRudolf Ing Datko
Priority to CS838960ApriorityCriticalpatent/CS238898B1/cs
Publication of CS896083A1publicationCriticalpatent/CS896083A1/cs
Publication of CS238898B1publicationCriticalpatent/CS238898B1/cs