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 Л.Д. Зуева, И.С. КизберfiledCriticalЛ.Д. Зуева
Priority to SU667ApriorityCriticalpatent/SU69556A1/ru
Application grantedgrantedCritical
Publication of SU69556A1publicationCriticalpatent/SU69556A1/ru