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 В.А. Матвеев, М.А. МатвеевfiledCriticalВ.А. Матвеев
Priority to SU11063ApriorityCriticalpatent/SU75565A2/en
Application grantedgrantedCritical
Publication of SU75565A2publicationCriticalpatent/SU75565A2/en