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 Е.А. КоленкоfiledCriticalЕ.А. Коленко
Priority to SU539ApriorityCriticalpatent/SU73598A1/en
Application grantedgrantedCritical
Publication of SU73598A1publicationCriticalpatent/SU73598A1/en