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 А.С. Сипягин, гин А.С. СипfiledCriticalА.С. Сипягин
Priority to SU3857ApriorityCriticalpatent/SU65092A1/ru
Application grantedgrantedCritical
Publication of SU65092A1publicationCriticalpatent/SU65092A1/ru