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.)
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Application filed by Р.Я. Садогурская, Р.Я. СадогурскаfiledCriticalР.Я. Садогурская
Priority to SU4003ApriorityCriticalpatent/SU65554A1/ru
Application grantedgrantedCritical
Publication of SU65554A1publicationCriticalpatent/SU65554A1/ru