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 Janda, Bedrich Sindelar, Karel WagnerfiledCriticalFrantisek Janda
Priority to CS311477ApriorityCriticalpatent/CS188720B1/en
Publication of CS188720B1publicationCriticalpatent/CS188720B1/en