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.Ф. МарковfiledCriticalИ.Ф. Марков
Priority to SU??-5192ApriorityCriticalpatent/SU52085A1/en
Application grantedgrantedCritical
Publication of SU52085A1publicationCriticalpatent/SU52085A1/en