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 Б.Ф. КустовfiledCriticalБ.Ф. Кустов
Priority to SU380663ApriorityCriticalpatent/SU73661A1/en
Application grantedgrantedCritical
Publication of SU73661A1publicationCriticalpatent/SU73661A1/en