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 Antonin Petrzelka, Zdenek VinklarekfiledCriticalAntonin Petrzelka
Priority to CS80677ApriorityCriticalpatent/CS186638B1/cs
Publication of CS186638B1publicationCriticalpatent/CS186638B1/cs