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 Strnad, Jan LampafiledCriticalFrantisek Strnad
Priority to CS656976ApriorityCriticalpatent/CS187753B1/en
Publication of CS187753B1publicationCriticalpatent/CS187753B1/en