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 Vaclav Ptacek, Jiri SvobodafiledCriticalVaclav Ptacek
Priority to CS836577ApriorityCriticalpatent/CS193350B1/cs
Publication of CS193350B1publicationCriticalpatent/CS193350B1/cs