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 И.М. Семячкин, чкин И.М. СемfiledCriticalИ.М. Семячкин
Priority to SU2335ApriorityCriticalpatent/SU74582A1/ru
Application grantedgrantedCritical
Publication of SU74582A1publicationCriticalpatent/SU74582A1/ru