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.И. ЛитвакfiledCriticalВ.И. Литвак
Priority to SU111704ApriorityCriticalpatent/SU36782A1/en
Application grantedgrantedCritical
Publication of SU36782A1publicationCriticalpatent/SU36782A1/en