When was the Scottish-born scientist died after whose invention "Kōbushō" had started an effort to make telephone receivers?
Alexander Graham Bell Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone and founding the American Telephone and Telegraph Company (AT&T) in 1885.
Kinjiro Okabe Kinjiro Okabe (岡部 金治郎 , Okabe Kinjirō , March 27, 1896 – April 8, 1984) was a Japanese electrical engineering researcher and professor who made major contributions to magnetron and radar development. He did work after the Second World War on medical instruments using ultrasounds.