Template:Selected anniversaries/June 20: Difference between revisions
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||2011: Professor He Zehui dies ... nuclear physicist who worked to develop and exploit nuclear physics in Germany and China. Pic. | ||2011: Professor He Zehui dies ... nuclear physicist who worked to develop and exploit nuclear physics in Germany and China. Pic. | ||
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Revision as of 18:22, 6 February 2022
1840: Samuel Morse receives the patent for the telegraph.
1875: Inventor and engineer Wilhelm Bauer dies. He designed and built several hand-powered submarines.
1877: Alexander Graham Bell installs the world's first commercial telephone service in Hamilton, Ontario, Canada.