When was the Scottish-born scientist died after whose invention "Kōbushō" had started an effort to make telephone receivers?
Oki Kibatarō Oki Kibatarō (沖 牙太郎 , 1848–1906) was an engineer formerly employed at a Japanese Ministry of Industry ("Kōbushō") factory. In 1877, only a year after Alexander Graham Bell's invention, "Kōbushō" had started an effort to make telephone receivers by reverse engineering and Oki was in the team that came up with the first prototype.
Mikhail Dolivo-Dobrovolsky Mikhail Osipovich Dolivo-Dobrovolsky (Russian: Михаи́л О́сипович Доли́во-Доброво́льский ; German: "Michail von Dolivo-Dobrowolsky" or "Michail Ossipowitsch Doliwo-Dobrowolski"; Polish: "Michał Doliwo-Dobrowolski" ; January 2 [O.S. December 21, 1861] 1862 in Gatchina near Saint Petersburg – November 15 [O.S. November 3] 1919 in Heidelberg, Germany), was a Polish-Russian engineer, electrician, and inventor. Born in a mixed family between a Polish noble family originating from Mazowsze, and a Russian noble family. Emigrated to Germany due to political persecution of Poles after the assassination of Alexander II of Russia (1881). He studied at the Darmstadt University of Technology (TH Darmstadt) in Germany. From 1887 he worked for AEG.