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 Fronka, Ladislav Moucka, Frantisek Brabec, Zdenek Pavlicek, Jaroslav CernavskyfiledCriticalOldrich Fronka
Priority to CS499373ApriorityCriticalpatent/CS178502B1/cs
Priority to CS765471Aprioritypatent/CS187723B1/cs
Publication of CS178502B1publicationCriticalpatent/CS178502B1/cs