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 Ubomir Ing Grohmann, Jozef Ing JenisfiledCriticalUbomir Ing Grohmann
Priority to CS873500ApriorityCriticalpatent/CS261840B1/en
Publication of CS350087A1publicationCriticalpatent/CS350087A1/en
Publication of CS261840B1publicationCriticalpatent/CS261840B1/en