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 Б.А. МейзельfiledCriticalБ.А. Мейзель
Priority to SU173886ApriorityCriticalpatent/SU48411A1/en
Application grantedgrantedCritical
Publication of SU48411A1publicationCriticalpatent/SU48411A1/en