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Filing date
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Application filed by Н.И. прибыльщиков, В. В. ИсаевfiledCriticalН.И. прибыльщиков
Priority to SU1842902ApriorityCriticalpatent/SU436183A2/en
Application grantedgrantedCritical
Publication of SU436183A1publicationCriticalpatent/SU436183A1/en
Publication of SU436183A2publicationCriticalpatent/SU436183A2/en