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 Е.А. Граничнова, Л.В. НикитинfiledCriticalЕ.А. Граничнова
Priority to SU0351ApriorityCriticalpatent/SU72097A1/ru
Application grantedgrantedCritical
Publication of SU72097A1publicationCriticalpatent/SU72097A1/ru