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 В П Т ~, Щ ii.^?'i::g ifiledCriticalВ П Т ~
Priority to SU772507878ApriorityCriticalpatent/SU652442A1/en
Application grantedgrantedCritical
Publication of SU652442A1publicationCriticalpatent/SU652442A1/en