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 Ю.Ф. Крюгер, М.П. СвиридовfiledCriticalЮ.Ф. Крюгер
Priority to SU58295ApriorityCriticalpatent/SU25167A1/ru
Application grantedgrantedCritical
Publication of SU25167A1publicationCriticalpatent/SU25167A1/ru