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 С.С. ИосифовfiledCriticalС.С. Иосифов
Priority to SU50744ApriorityCriticalpatent/SU28232A1/en
Application grantedgrantedCritical
Publication of SU28232A1publicationCriticalpatent/SU28232A1/en