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.И. ГолубовичfiledCriticalЯ.И. Голубович
Priority to SU50780ApriorityCriticalpatent/SU77189A1/en
Application grantedgrantedCritical
Publication of SU77189A1publicationCriticalpatent/SU77189A1/en