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Application filed by Ленинградский Институт Водного ТранспортаfiledCriticalЛенинградский Институт Водного Транспорта
Priority to SU1900017ApriorityCriticalpatent/SU447699A1/en
Priority claimed from SU1900017Aexternal-prioritypatent/SU447699A1/en
Application grantedgrantedCritical
Publication of SU447699A2publicationCriticalpatent/SU447699A2/en
Publication of SU447699A1publicationCriticalpatent/SU447699A1/en