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 Karel Ing Vich, Frantisek Ing NechojdomafiledCriticalKarel Ing Vich
Priority to CS90886ApriorityCriticalpatent/CS88690A2/en
Publication of CS88690A2publicationCriticalpatent/CS88690A2/en