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 Ленинградский Институт Водного ТранспортаfiledCriticalЛенинградский Институт Водного Транспорта
Priority to SU2077904ApriorityCriticalpatent/SU542835A1/en
Application grantedgrantedCritical
Publication of SU542835A1publicationCriticalpatent/SU542835A1/en