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 Tomas Ing Rayman, Vaclav Ing RaymanfiledCriticalTomas Ing Rayman
Priority to CS868377ApriorityCriticalpatent/CS257717B1/en
Publication of CS837786A1publicationCriticalpatent/CS837786A1/en
Publication of CS257717B1publicationCriticalpatent/CS257717B1/en