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 Jan Ing Hendrych, Ivan Ing HrebackafiledCriticalJan Ing Hendrych
Priority to CS858509ApriorityCriticalpatent/CS253525B1/cs
Publication of CS850985A1publicationCriticalpatent/CS850985A1/cs
Publication of CS253525B1publicationCriticalpatent/CS253525B1/cs