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 И.Г. ПотаповfiledCriticalИ.Г. Потапов
Priority to SU71428ApriorityCriticalpatent/SU21182A1/en
Application grantedgrantedCritical
Publication of SU21182A1publicationCriticalpatent/SU21182A1/en