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 Drahoslav Strasky, Otto MatousekfiledCriticalDrahoslav Strasky
Priority to CS136981ApriorityCriticalpatent/CS222562B1/cs
Publication of CS222562B1publicationCriticalpatent/CS222562B1/cs