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 А.А. ВалентэйfiledCriticalА.А. Валентэй
Priority to SU124006ApriorityCriticalpatent/SU41356A1/ru
Application grantedgrantedCritical
Publication of SU41356A1publicationCriticalpatent/SU41356A1/ru