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.И. ШашковfiledCriticalИ.И. Шашков
Priority to SU70388ApriorityCriticalpatent/SU26693A1/en
Application grantedgrantedCritical
Publication of SU26693A1publicationCriticalpatent/SU26693A1/en