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 Frantisek Seidl, Adolf Seidl, Bohumil MachufiledCriticalFrantisek Seidl
Priority to CS567675ApriorityCriticalpatent/CS178657B1/cs
Publication of CS178657B1publicationCriticalpatent/CS178657B1/cs