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.Я. ДанилевскийfiledCriticalВ.Я. Данилевский
Priority to SU8213ApriorityCriticalpatent/SU14460A1/en
Application grantedgrantedCritical
Publication of SU14460A1publicationCriticalpatent/SU14460A1/en