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 Inst Optiki Atmosfery Tom FilifiledCriticalInst Optiki Atmosfery Tom Fili
Priority to SU4836407priorityCriticalpatent/RU1821803C/en
Application grantedgrantedCritical
Publication of RU1821803CpublicationCriticalpatent/RU1821803C/en