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 Proksa Bohumil, Jozef Ing CernyfiledCriticalProksa Bohumil
Priority to CS831589ApriorityCriticalpatent/CS232329B1/cs
Publication of CS158983A1publicationCriticalpatent/CS158983A1/cs
Publication of CS232329B1publicationCriticalpatent/CS232329B1/cs