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 Oldrich Ing Cech, Jan Ing Sobola, Vratislava SafarikfiledCriticalOldrich Ing Cech
Priority to CS839921ApriorityCriticalpatent/CS241632B1/cs
Publication of CS992183A1publicationCriticalpatent/CS992183A1/cs
Publication of CS241632B1publicationCriticalpatent/CS241632B1/cs