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Application filed by Grigori Konstantinovi Bannikov, Grigori Gavrilovitch Brusko, Alexander Mironovitch Sigarev, Abram Lazarevitch LivchitsfiledCriticalGrigori Konstantinovi Bannikov
Priority to BE592725ApriorityCriticalpatent/BE592725A/en
Publication of BE592725ApublicationCriticalpatent/BE592725A/en