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 С.П. ПокромовичfiledCriticalС.П. Покромович
Priority to SU1268ApriorityCriticalpatent/SU74534A1/ru
Application grantedgrantedCritical
Publication of SU74534A1publicationCriticalpatent/SU74534A1/ru