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.В. ПарфеновfiledCriticalВ.В. Парфенов
Priority to SU18075ApriorityCriticalpatent/SU10502A1/en
Application grantedgrantedCritical
Publication of SU10502A1publicationCriticalpatent/SU10502A1/en