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 Н.Н. Ворожцов (младший), П.В. КарлашfiledCriticalН.Н. Ворожцов (младший)
Priority to SU107874ApriorityCriticalpatent/SU30689A1/ru
Application grantedgrantedCritical
Publication of SU30689A1publicationCriticalpatent/SU30689A1/ru