Sontag, I. text Ekaterinburg : [publisher not identified], 31 mai︠a︡ 1913 g. rus This collection consists of a selection of tsarist patents awarded to residents of the Urals, Siberia, and the Russian Far East in the final years of the empire. These documents are a valuable source of information about the opening of the Siberian and Far Eastern regions in the nineteenth and early twentieth centuries and technological progress in Russia--the state of industrial development, the organization of industry, and the extent of mining and mineral excavation. Patent Classification: Group V - Sports; Group XII - Transportation. The State Public Scientific and Technical Library of the Siberian Branch of the Russian Academy of Sciences vozdukhoplavanie parashi︠u︡t patenty Primor'e Tsarist Patents, 1899-1917: Urals, Siberia, and the Russian Far East https://hdl.loc.gov/loc.ndlpcoop/mtfxtx.ecp0094