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 Ing Csc PetricekfiledCriticalVaclav Ing Csc Petricek
Priority to CS856784ApriorityCriticalpatent/CS255425B1/en
Publication of CS678485A1publicationCriticalpatent/CS678485A1/en
Publication of CS255425B1publicationCriticalpatent/CS255425B1/en