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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Publication date
Application filed by Г.Ф. Бежко, Н.И. ПавловfiledCriticalГ.Ф. Бежко
Priority to SU172349ApriorityCriticalpatent/SU49237A1/ru
Application grantedgrantedCritical
Publication of SU49237A1publicationCriticalpatent/SU49237A1/ru