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 Б.А. Кренцель, А.С. НекрасовfiledCriticalБ.А. Кренцель
Priority to SU1071ApriorityCriticalpatent/SU72303A1/ru
Application grantedgrantedCritical
Publication of SU72303A1publicationCriticalpatent/SU72303A1/ru