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.)
Filing date
Publication date
Application filed by Н. А. Криштопа, В. П. РоссихинfiledCriticalН. А. Криштопа
Priority to SU1816029ApriorityCriticalpatent/SU438521A1/ru
Priority claimed from SU1816029Aexternal-prioritypatent/SU438521A1/ru
Application grantedgrantedCritical
Publication of SU438521A2publicationCriticalpatent/SU438521A2/ru
Publication of SU438521A1publicationCriticalpatent/SU438521A1/ru