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 Ing Fuksa, Ctibor Ing Csc PetrufiledCriticalFrantisek Ing Fuksa
Priority to CS822868ApriorityCriticalpatent/CS232367B1/en
Publication of CS286882A1publicationCriticalpatent/CS286882A1/en
Publication of CS232367B1publicationCriticalpatent/CS232367B1/en