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 Я.С. ГерасимовfiledCriticalЯ.С. Герасимов
Priority to SU136981ApriorityCriticalpatent/SU39521A1/ru
Application grantedgrantedCritical
Publication of SU39521A1publicationCriticalpatent/SU39521A1/ru