Привилегии (патенты) в Российской Империи

Указатели хронологические, предметные и алфавитные выданных в России привилегий

This book is an index of Russian privileges (patents) granted by the Empire's Trading and Manufactures Department to inventors from 1914 to 1883

This book is an index of Russian privileges (patents) granted by the Empire's Trading and Manufactures Department to inventors from 1984 to 1887