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 В.А. РыбниковfiledCriticalВ.А. Рыбников
Priority to SU828ApriorityCriticalpatent/SU73930A1/en
Application grantedgrantedCritical
Publication of SU73930A1publicationCriticalpatent/SU73930A1/en