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 Л.М. ПорецкийfiledCriticalЛ.М. Порецкий
Priority to SU132278ApriorityCriticalpatent/SU48858A1/ru
Application grantedgrantedCritical
Publication of SU48858A1publicationCriticalpatent/SU48858A1/ru