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 Cestmir Mejkal, Jaroslav SantrucekfiledCriticalCestmir Mejkal
Priority to CS878075ApriorityCriticalpatent/CS178708B1/cs
Publication of CS178708B1publicationCriticalpatent/CS178708B1/cs