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 В. И. Шурпа и В. Г. ДубенецfiledCriticalВ. И. Шурпа и В. Г. Дубенец
Priority to SU782629840ApriorityCriticalpatent/SU694693A1/en
Application grantedgrantedCritical
Publication of SU694693A1publicationCriticalpatent/SU694693A1/en