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 Proizv Ob Edinenie Omskij ElekfiledCriticalProizv Ob Edinenie Omskij Elek
Priority to SU904811815ApriorityCriticalpatent/RU1832261C/ru
Application grantedgrantedCritical
Publication of RU1832261CpublicationCriticalpatent/RU1832261C/ru