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 И.П. ПолевойfiledCriticalИ.П. Полевой
Priority to SU113547ApriorityCriticalpatent/SU31765A1/ru
Application grantedgrantedCritical
Publication of SU31765A1publicationCriticalpatent/SU31765A1/ru