Б. М. Есельсон А. Ф. Попов П. Сорокин изобретени А. Ф. Жигач
В. М. Заплетн Д. П. Чел нова Р. Е. Прокофьева А.С. Захарцева
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 filedfiledCritical
Priority to SU1778671ApriorityCriticalpatent/SU422739A1/ru
Application grantedgrantedCritical
Publication of SU422739A1publicationCriticalpatent/SU422739A1/ru