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 Г.А. БехтлеfiledCriticalГ.А. Бехтле
Priority to SU2120ApriorityCriticalpatent/SU71094A1/ru
Application grantedgrantedCritical
Publication of SU71094A1publicationCriticalpatent/SU71094A1/ru