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 В.А. ГуровfiledCriticalВ.А. Гуров
Priority to SU1250ApriorityCriticalpatent/SU71983A1/en
Application grantedgrantedCritical
Publication of SU71983A1publicationCriticalpatent/SU71983A1/en