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 К- А. ГендрихfiledCriticalК- А. Гендрих
Priority to SU782574679ApriorityCriticalpatent/SU675429A1/en
Application grantedgrantedCritical
Publication of SU675429A1publicationCriticalpatent/SU675429A1/en