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 Zdenek Ing ZacpalfiledCriticalZdenek Ing Zacpal
Priority to CS856259ApriorityCriticalpatent/CS251828B1/en
Publication of CS625985A1publicationCriticalpatent/CS625985A1/en
Publication of CS251828B1publicationCriticalpatent/CS251828B1/en