И. Вольченко А. Ф. Нефедов Д. А. Примикирио И. В. Белоус М. Клиса вительИвано Франковский институт нефти газа Авторы изобретени И. М. Богатчук
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 SU1688767ApriorityCriticalpatent/SU389329A1/ru
Application grantedgrantedCritical
Publication of SU389329A1publicationCriticalpatent/SU389329A1/ru