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 Mares, Miloslav Ing LejcekfiledCriticalVaclav Mares
Priority to CS856891ApriorityCriticalpatent/CS253496B1/cs
Publication of CS689185A1publicationCriticalpatent/CS689185A1/cs
Publication of CS253496B1publicationCriticalpatent/CS253496B1/cs