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 П.П. Вербо, В.Н. КарцевfiledCriticalП.П. Вербо
Priority to SU43661ApriorityCriticalpatent/SU72150A1/ru
Application grantedgrantedCritical
Publication of SU72150A1publicationCriticalpatent/SU72150A1/ru