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 TsentroenergotsvetmefiledCriticalProizv Ob Tsentroenergotsvetme
Priority to SU782600287ApriorityCriticalpatent/SU690261A1/en
Application grantedgrantedCritical
Publication of SU690261A1publicationCriticalpatent/SU690261A1/en