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.М. КонторовfiledCriticalБ.М. Конторов
Priority to SU927ApriorityCriticalpatent/SU76534A1/en
Application grantedgrantedCritical
Publication of SU76534A1publicationCriticalpatent/SU76534A1/en