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 А.А. Беэр, В.А. КурдюковаfiledCriticalА.А. Беэр
Priority to SU4807ApriorityCriticalpatent/SU70497A1/en
Application grantedgrantedCritical
Publication of SU70497A1publicationCriticalpatent/SU70497A1/en