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 А.А. СпрысковfiledCriticalА.А. Спрысков
Priority to SU1054-47ApriorityCriticalpatent/SU71410A1/en
Application grantedgrantedCritical
Publication of SU71410A1publicationCriticalpatent/SU71410A1/en