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 Jan Ing Ostraticky, Zdenek Ing Fischer, Alois Ing KoutnyfiledCriticalJan Ing Ostraticky
Priority to CS835042ApriorityCriticalpatent/CS239269B1/en
Publication of CS504283A1publicationCriticalpatent/CS504283A1/en
Publication of CS239269B1publicationCriticalpatent/CS239269B1/en