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 Bohumir Popela, Alois StejskalfiledCriticalBohumir Popela
Priority to CS624376ApriorityCriticalpatent/CS183575B1/cs
Publication of CS183575B1publicationCriticalpatent/CS183575B1/cs