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Application filed by П.Г. СубботинfiledCriticalП.Г. Субботин
Priority to SU20967ApriorityCriticalpatent/RU14947C/en
Priority claimed from SU20967Aexternal-prioritypatent/RU14947C/en
Application grantedgrantedCritical
Publication of SU14947A1publicationCriticalpatent/SU14947A1/en
Publication of RU14947CpublicationCriticalpatent/RU14947C/en