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 Н.Н. Мельников, А.В. СкалозубоваfiledCriticalН.Н. Мельников
Priority to SU375798ApriorityCriticalpatent/SU72403A1/ru
Application grantedgrantedCritical
Publication of SU72403A1publicationCriticalpatent/SU72403A1/ru