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. ТовбинfiledCriticalБ.А. Товбин
Priority to SU133743ApriorityCriticalpatent/SU39103A1/en
Application grantedgrantedCritical
Publication of SU39103A1publicationCriticalpatent/SU39103A1/en